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  1. #1

    Media for moving bed.

    So Iím adding a 120litre blue barrel moving bed to my system. And am considering hel x 13. And just wanted to know others experiences if they used it. Either that or Iím guna go for the ďsimilar to k1Ē. What I wanted to know is the hel x 13 really that much better then k1. Iím guna probably go with 60 litres of media 50 litres new stuff and 10 what I have left over from a previous batch. I wish I got one of these blue barrels earlier the one I have is really thick plastic much better then the water butt alternative I was looking at. And loads cheaper over the other moving bed I have which is a Kingspan one I think which is square. Cheers


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  2. #2
    Thinking about this myself and by looking at YouTube Koi enthusiasts - they all seem to agree and use the Oase Hel-X13 as a moving bed media. It can hold a far more greater bacteria count via an increase in its surface area and said bacteria is encouraged to take a better stronghold within the inside of the floating media.

    Im in the process of building a moving bed filter - as soon as the outstanding items has arrived, for a DIY project to brighten up an otherwise dull day. This one will be using 100L of Hel-X13 media and will be pump driven using a Tempest as a pre-filter. The moving bed will then be agitated by inlet water pump and air pump and then gravity fed back into the pond. Im hoping that it will be zero maintenance too!

    Will put up some pictures during the build when I start!

    Good luck with your DIY Project.
    Last edited by Nick Barry Wales; 07-10-2021 at 11:21 AM.

  3. #3
    Quote Originally Posted by Nick Barry Wales View Post
    Thinking about this myself and by looking at YouTube Koi enthusiasts - they all seem to agree and use the Oase Hel-X13 as a moving bed media. It can hold a far more greater bacteria count via an increase in its surface area and said bacteria is encouraged to take a better stronghold within the inside of the floating media.

    Im in the process of building a moving bed filter - as soon as the outstanding items has arrived, for a DIY project to brighten up an otherwise dull day. This one will be using 100L of Hel-X13 media and will be pump driven using a Tempest as a pre-filter. The moving bed will then be agitated by inlet water pump and air pump and then gravity fed back into the pond. Im hoping that it will be zero maintenance too!

    Will put up some pictures during the build when I start!

    Good luck with your DIY Project.
    Hi Nick mate! Ahhh decent. I see derby koi used it. And pond guru recommends it. But looking at it in the shop it does look better than k1 ... well to me! Yeah mate post the pics up! Get ideas from other peoples diy. I already have a diy moving bed which will run along side my new one and the only maintanance it gets is I empty it out by a spaghetti sieve for the media and stick a pump into it to pump out the water just to check no stuck crud anywhere, I do that end of season and end of season with all my other filters. I donít even have a waste to ball valve on it as it doesnít need it. Hereís where il upto with mine for now. IMG_2536.jpg


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  4. #4
    Hi All
    well earlier today my Rubbermaid Brute 151Ltr grey bucket with snap-lock lid arrived ready for a DIY Moving Bed Filter that I had in mind, influenced by YouTube Koi Enthusiasts such as Derby Koi and Wrighty! So searching the internet, typically Ebay and other on-line Pond/Koi Retailers I bought a few bits and pieces needed to assemble said Moving Bed Filter.

    The Pipe Systems are a Nightmare! - and some "Apollo-13" ingenuity was required at one point to match up the screened inlet/outlet straining baskets (40mm) - for 40mm Solvent Weld (Pressure Pipe) to these components. As they were not a good fit for solvent weld, I utilised two bands of electrical tape and a generous bead of Selant-Adhesive called CT1 to affix these strainers to the 40mm Solvent weld pipe sections. Allowed to cure and set for several days.

    The Rubbermaid Brute container arrived - and its remarkably close, in dimensions, to that of the Moving Bed Filter as manufactured by a Dutch Company but whose product is in Black and costs a lot more. The Brute Container is made from Medium Density Food-Grade Polyethylene and has the ideal footprint for what I have in mind.

    The series of pictures show:-

    The Brute Bucket itself (almost 60cmx60cmx73cm in Height) - holds 151lts but will in real-world be less than that as the product will be used to convey agitated water at lower height of the bucket itself.
    The First Cut. No going back now. Using a 64mm Holesaw. This will be the water input feed
    The Second Cut. This cut is the output and is slightly lower in height, by 10-15cm than that of the first cut.
    The two bulkhead connectors are affixed ensuring the rubber seal is on the outside of the connector and will, prior to filling with water, will have a bed of Gold Label Sealant on the internal side of the locking nut.
    The water inlet pipe enters the Brute Bucket via an internal 90 degree elbow, a short length of 40mm solvent weld pipe to a 45 degree elbow, to allow the pumped water to just skim above the base of the bucket to ensure that the bottom section is agitated and that a circular water flow can be made. Fingers crossed! As we are North of the Equator, I wanted a "Clock-wise" water flow of rotation - to work with "Mother Nature" in effect! (Wry Joke)
    Both Input and water output pipe sections are not solvent welded to the bulkhead connectors as these are inside the bucket and can be modified if things dont go to plan of need to be fine-tuned. They are a stiff fit as they stand into the 90 degree connectors in anycase.
    The exterior water feed connections will be via a hose connector - Im awaiting for a delivery of a few imperial/metric to solvent weld hosetail sleeves/adaptors to arrive to finish this aspect off.
    The exterior output section, via a Kockney Koi 90 Degree elbow and Black Solvent Weld Pipe, is then matched up (via adaptors) to an EA Ball Valve. I wanted a ball valve to control the height of the water within the Brute Bucket and ensure that there is sufficient 'Dwell Time" for the Oase Hel-X13 floating media to be on the boil before the controlled overflow is returned back to the pond by gravity. Water throughputs isn't my main concern here but the minimum flow rate will be 5500 Ltrs as this Moving Bed Filter will be pre-screened via an EA Tempest which is fed water via an EA 10000 Varipump.

    Agitation will be via a 22cm Airstone fed by 8mm hose via single dedicated EA 95 Airpump.

    Im hoping to use , but will add as required, upto 75Ltrs of Hel-X13 media into the bucket on the proviso that the Boil action is behaving as anticipated. I will Start off with 25ltrs and add more as I go along to ensure that the boil is looking good at the intended water flow rate.

    The only one thing I have to do, other than the solvent weld of the Hosetail input feed, is drill a suitable hole and use a cable gland to accept the EA 8mm Sinking black airline into the bucket itself. I will either drill this hole somewhere discreet on the to side of the Brute bucket or indeed have it drilled through the lid - along with a vent hole to avoid any air pressure build up - not that the lid forms an airtight seal in anycase! I haven't decided yet! - what do you think?

    Im expecting to have this item set up into my pond by the end of next week.

    In the meantime a few pics of the step-by-step approach to an interesting DIY Project.

    Enjoy!
    Attached Images Attached Images
    Last edited by Nick Barry Wales; 13-10-2021 at 04:21 PM.

  5. Thanks dbs, Ajm Thanked / Liked this Post
  6. #5
    Quote Originally Posted by Nick Barry Wales View Post
    Hi All
    well earlier today my Rubbermaid Brute 151Ltr grey bucket with snap-lock lid arrived ready for a DIY Moving Bed Filter that I had in mind, influenced by YouTube Koi Enthusiasts such as Derby Koi and Wrighty! So searching the internet, typically Ebay and other on-line Pond/Koi Retailers I bought a few bits and pieces needed to assemble said Moving Bed Filter.

    The Pipe Systems are a Nightmare! - and some "Apollo-13" ingenuity was required at one point to match up the screened inlet/outlet straining baskets (40mm) - for 40mm Solvent Weld (Pressure Pipe) to these components. As they were not a good fit for solvent weld, I utilised two bands of electrical tape and a generous bead of Selant-Adhesive called CT1 to affix these strainers to the 40mm Solvent weld pipe sections. Allowed to cure and set for several days.

    The Rubbermaid Brute container arrived - and its remarkably close, in dimensions, to that of the Moving Bed Filter as manufactured by a Dutch Company but whose product is in Black and costs a lot more. The Brute Container is made from Medium Density Food-Grade Polyethylene and has the ideal footprint for what I have in mind.

    The series of pictures show:-

    The Brute Bucket itself (almost 60cmx60cmx73cm in Height) - holds 151lts but will in real-world be less than that as the product will be used to convey agitated water at lower height of the bucket itself.
    The First Cut. No going back now. Using a 64mm Holesaw. This will be the water input feed
    The Second Cut. This cut is the output and is slightly lower in height, by 10-15cm than that of the first cut.
    The two bulkhead connectors are affixed ensuring the rubber seal is on the outside of the connector and will, prior to filling with water, will have a bed of Gold Label Sealant on the internal side of the locking nut.
    The water inlet pipe enters the Brute Bucket via an internal 90 degree elbow, a short length of 40mm solvent weld pipe to a 45 degree elbow, to allow the pumped water to just skim above the base of the bucket to ensure that the bottom section is agitated and that a circular water flow can be made. Fingers crossed! As we are North of the Equator, I wanted a "Clock-wise" water flow of rotation - to work with "Mother Nature" in effect! (Wry Joke)
    Both Input and water output pipe sections are not solvent welded to the bulkhead connectors as these are inside the bucket and can be modified if things dont go to plan of need to be fine-tuned. They are a stiff fit as they stand into the 90 degree connectors in anycase.
    The exterior water feed connections will be via a hose connector - Im awaiting for a delivery of a few imperial/metric to solvent weld hosetail sleeves/adaptors to arrive to finish this aspect off.
    The exterior output section, via a Kockney Koi 90 Degree elbow and Black Solvent Weld Pipe, is then matched up (via adaptors) to an EA Ball Valve. I wanted a ball valve to control the height of the water within the Brute Bucket and ensure that there is sufficient 'Dwell Time" for the Oase Hel-X13 floating media to be on the boil before the controlled overflow is returned back to the pond by gravity. Water throughputs isn't my main concern here but the minimum flow rate will be 5500 Ltrs as this Moving Bed Filter will be pre-screened via an EA Tempest which is fed water via an EA 10000 Varipump.

    Agitation will be via a 22cm Airstone fed by 8mm hose via single dedicated EA 95 Airpump.

    Im hoping to use , but will add as required, upto 75Ltrs of Hel-X13 media into the bucket on the proviso that the Boil action is behaving as anticipated. I will Start off with 25ltrs and add more as I go along to ensure that the boil is looking good at the intended water flow rate.

    The only one thing I have to do, other than the solvent weld of the Hosetail input feed, is drill a suitable hole and use a cable gland to accept the EA 8mm Sinking black airline into the bucket itself. I will either drill this hole somewhere discreet on the to side of the Brute bucket or indeed have it drilled through the lid - along with a vent hole to avoid any air pressure build up - not that the lid forms an airtight seal in anycase! I haven't decided yet! - what do you think?

    Im expecting to have this item set up into my pond by the end of next week.

    In the meantime a few pics of the step-by-step approach to an interesting DIY Project.

    Enjoy!
    Looking good mate! Nice containers them they do a similar shaped on in bnq which holds like 330 litres that I seen people use in the past! Any reason why you used pressure pipe within the moving bed? Looks very tidy but wouldnít waste pipe worked out cheaper is there a benefit ? You should at least get 75 litres in that if itís a 150 litre container! Go on eBay for the hel x you will get it cheaper. Quiet a lot cheaper! I havenít bought my media for mine yet as I now making a diy sieve so I may connect mine up febaury time now as I donít really need the extra filtration through the winter but il see how I feel as would be nice to see it all running! Haha


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  7. #6
    Well recent progress with my Moving Bed filter over the weekend has been the drilling of two holes (via a 25mm holesaw) for two 20mm cable glands. Each gland can accept Black Sinking EA 8mm Airline hose - of which will be run through one of them to drive an air-stone disc.

    Im in the process of levelling the base in readiness to accept the bucket to stand upon a flagstone but in this weather (heavy rainfall at present) its on hold. Im nearly there. Once that base is level and the flagstone is also fitted in place and again level in both axis's then its a simple matter of connecting up the Moving Bed Filter via flexible hose lengths (cut to length once the filter is in situ) and then switching on the water pump.

    Im looking forward to seeing this up and running.

    I used pressure pipe as basically I had lots of 1.5inch Pressure pipe at hand, As mentioned in an earlier thread - this filter isn't about high water volume throughput. It will have enough water flow through the system so that the Tempest, acting as a simple pre-filter screen, is running ok and then let it develop a good boil of Hel-X13 and let it mature over time. Its about getting extra Biological filtration in my pond using what space I have available and a few components bought in to make in an afternoon.

    Pics attached of the cable entry glands. Notice the strengthened moulding in the lid - the holes were drilled from the underside and then the glands fitted a treat!

    If anyone else is considering making one then just take your time at each and every step. Have plenty of disposable clothes at hand (to wipe off Solvent weld glue). and cut and mark your pipework. Measure twice and cut once.
    Attached Images Attached Images
    Last edited by Nick Barry Wales; 23-10-2021 at 03:33 PM.

  8. Thanks dbs Thanked / Liked this Post
  9. #7
    Quote Originally Posted by Nick Barry Wales View Post
    Well recent progress with my Moving Bed filter over the weekend has been the drilling of two holes (via a 25mm holesaw) for two 20mm cable glands. Each gland can accept Black Sinking EA 8mm Airline hose - of which will be run through one of them to drive an ayirstone disc.

    Im in the process of levelling the base in readiness to accept the bucket to stand upon a flagstone but in this weather (heavy rainfall at present) its on hold. Im nearly there. Once that base is level and the flagstone is also fitted in place and again level in both axis's then its a simple matter of connecting up the Moving Bed Filter via flexible hose lengths (cut to length once the filter is in situ) and then switching on the water pump.

    Im looking forward to seeing this up and running.

    I used pressure pipe as basically I had lots of 1.5inch Pressure pipe at hand, As mentioned in an earlier thread - this filter isn't about high water volume throughput. It will have enough water flow through the system so that the Tempest, acting as a simple pre-filter screen, is running ok and then let it develop a good boil of Hel-X13 and let it mature over time. Its about getting extra Biological filtration in my pond using what space I have available and a few components bought in to make in an afternoon.

    Pics attached of the cable entry glands. Notice the strengthened moulding in the lid - the holes were drilled from the underside and then the glands fitted a treat!

    If anyone else is considering making one then just take your time at each and every step. Have plenty of disposable clothes at hand (to wipe off Solvent weld glue). and cut and mark your pipework. Measure twice and cut once.
    Haha you sound exited!!! Thatís the best bit about diy!


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  10. #8
    Senior Member Rank = Mature Champion dbs's Avatar
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    That's a cracking job, nicely done, I too am looking forward to seeing it working, keep up the photos

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  11. #9
    Further advancements to my DIY Moving Bed Filter (MBF). The Base was made level yesterday using more sacks of gravel/horticultural grit/Sand to ensure that the wooden framed base was level along each axis and allowed to settle (without water) overnight. There has to be around 100Kgs of stone chipping/gravel and sand to achieve a reasonable level and solid base upon which my wooden frame and decking plank offcuts used to provide a solid and level base.


    Today I have fitted the last two hose-tail connections - one from the 1.5" pressure pipe (terminated with a decoupling stepped hose tail connector, using Solvent Weld Glue) and the output return being flexible hose from the MBF directly to the pond itself.

    The airline hose fitted very nicely through the 20mm Cable gland and a simple loop was made and secured using a cable-tie. The end of this airline hose, which will sit within the internal base of the MBF was also fitted along with a 90degree 8mm air hose coupler to accept the 8mm input air disc.

    Im awaiting two more items some flexible hose to fit to my EA 10000 Water pump. The electrical cables was run into position today (but not powered up), so thats ready for when the hose is connected to the Water pump said water pump placed into the pond and the output connected to the stepped hosetail on the EA Tempest.

    The other item on order being a 3/8 one way air valve which will connect directly to my EA Airtec 95 Air pump to drive the air disc itself.

    As soon as the unit is filled with water and 50Ltrs of Hel-X13 media then I will take a few pics of the MBF in action.Hope it boils up a treat! when both the water and air supply is provided!

    Nearly there, just a few more items to arrive to finish off the job so its done properly. I hope!

    Pics attached for you to see the progress.Water inlet and output.jpgMBF In Place.jpgWater Hose Inlet.jpg

 

 

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