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  1. #281
    An update on my 77 micron mesh.

    Now been installed for 2.5 days having installed it on Tuesday evening, now Friday morning.

    Flow rate: The pump sat on the bottom of my pond is a fixed 4000 lph so that has stayed as is. The pump running my surface skimmer is variable and I upped this to 50% and therefore 13000 lph yesterday during the day. So now running at 17000 lph, not deducting any head loss but filter system is about level and within 2 metres of the pond. Bear in mind I'm pump fed so the Solum 16 spec suggests a max of 12000lph. I reckon I could crank up the variable further and still be no less than 20 min cleans.

    Cleans: Still very good. Even with the increased flow rate, I came out this morning and time between cleans was 32 minutes. I suspect if I went back to 30% on the variable pump, the time would be around 40-50 mins first thing in the morning.

    Water Quality: If I'm truthful, it's not as good as I had hoped. However, there maybe other factors such as I treated the pond at the weekend for Blanket Weed, the flow rate has been increased and so may be stirring up some rubbish which may clear in coming days. But I have to remember I've decreased the micron of the mesh so more will get through. It's bizarre as to the naked eye, you probably couldn't see much difference in the density of the 77 to the 57 so you wonder how anything gets through either. I'm wondering whether to cheekily ask Draco if they do a 67 micron....

    My Opinion So Far: Definitely glad I have changed the mesh, it has absolutely solved the 3 or 5 minute cleans that was killing my water usage and given me control of my pumps and flow rates. If my water quality improves over coming days, it will be perfect. Don't get me wrong, water quality is decent, but it's not as it has been before. Last night, I did add the 3rd pump to a ledge just under the water surface to improve the water circulation and try to resolve any dead spots. At 10000 lph, maybe a little too aggresive but it's certainly creating some water movement. Will see how it fairs over next 48 hours,and if my fish seem to like or dislike it.

    And finally: I'm assuming my pond must have a leak. Regardless of flow rate, my pond water level drops gradually over days. It can't be filter related as that would only add to the water volume when spray from the cleaning jets falls into the main area. The only time water can be lost is when it's cleaning and going down the chute. So I must have a leak in the pond itself or the water fall trough at the rear. More things to investigate!

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  3. #282
    Senior Member Rank = Jussai dbs's Avatar
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    Quote Originally Posted by mcwatson1974 View Post
    An update on my 77 micron mesh.

    Now been installed for 2.5 days having installed it on Tuesday evening, now Friday morning.

    Flow rate: The pump sat on the bottom of my pond is a fixed 4000 lph so that has stayed as is. The pump running my surface skimmer is variable and I upped this to 50% and therefore 13000 lph yesterday during the day. So now running at 17000 lph, not deducting any head loss but filter system is about level and within 2 metres of the pond. Bear in mind I'm pump fed so the Solum 16 spec suggests a max of 12000lph. I reckon I could crank up the variable further and still be no less than 20 min cleans.

    Cleans: Still very good. Even with the increased flow rate, I came out this morning and time between cleans was 32 minutes. I suspect if I went back to 30% on the variable pump, the time would be around 40-50 mins first thing in the morning.

    Water Quality: If I'm truthful, it's not as good as I had hoped. However, there maybe other factors such as I treated the pond at the weekend for Blanket Weed, the flow rate has been increased and so may be stirring up some rubbish which may clear in coming days. But I have to remember I've decreased the micron of the mesh so more will get through. It's bizarre as to the naked eye, you probably couldn't see much difference in the density of the 77 to the 57 so you wonder how anything gets through either. I'm wondering whether to cheekily ask Draco if they do a 67 micron....

    My Opinion So Far: Definitely glad I have changed the mesh, it has absolutely solved the 3 or 5 minute cleans that was killing my water usage and given me control of my pumps and flow rates. If my water quality improves over coming days, it will be perfect. Don't get me wrong, water quality is decent, but it's not as it has been before. Last night, I did add the 3rd pump to a ledge just under the water surface to improve the water circulation and try to resolve any dead spots. At 10000 lph, maybe a little too aggresive but it's certainly creating some water movement. Will see how it fairs over next 48 hours,and if my fish seem to like or dislike it.

    And finally: I'm assuming my pond must have a leak. Regardless of flow rate, my pond water level drops gradually over days. It can't be filter related as that would only add to the water volume when spray from the cleaning jets falls into the main area. The only time water can be lost is when it's cleaning and going down the chute. So I must have a leak in the pond itself or the water fall trough at the rear. More things to investigate!
    Sounds like a good result to me though I can't see the fines you are experiencing

    Water loss, are you sure it is not just evaporation and loss with wind on to the water cascade, is any element porous nearby that could be soaking up water spray ??

  4. #283
    Quote Originally Posted by dbs View Post
    Sounds like a good result to me though I can't see the fines you are experiencing

    Water loss, are you sure it is not just evaporation and loss with wind on to the water cascade, is any element porous nearby that could be soaking up water spray ??
    I do have an element of plants in my pond and my wife keeps telling me they could be absorbing some of the water but I refuse to believe it can be the amount that is going. My pond surface is around 3 metres long by about 1.5 metres wide and it drops around 1cm or 2cm a day.

    Below is a picture of my pond. I have my filter and bio returning to the 'trough' at the back which has plants in at both ends (can only see one end in the pic), then water drops into the main pond. So the plants could be drinking it, or could be losing from wind across the water spout, or just evaporation. I'm just surprised that it would gobble that much up. It's not a scary drop per day, but is a drop.

    20210417_165346.jpg

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  6. #284
    Senior Member Rank = Hassai Twhitenosugar's Avatar
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    Are you 100% sure it's not overflowing down the waste chute of the drum in the minutes before the drum starts to clean?

    I know you have your float switch high up. So just wondering if water trickles down the waste chute as the water level in the dirty side of the drum creeps up?

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

  7. #285
    Senior Member Rank = Hassai Twhitenosugar's Avatar
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    Nice looking pond and garden by the way.

    Looks like a nice place to chill out.

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

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  9. #286
    Quote Originally Posted by Twhitenosugar View Post
    Are you 100% sure it's not overflowing down the waste chute of the drum in the minutes before the drum starts to clean?

    I know you have your float switch high up. So just wondering if water trickles down the waste chute as the water level in the dirty side of the drum creeps up?

    Sent from my Pixel 4a (5G) using Tapatalk
    Having raised my float switch to the highest point possible (took your advice), I have made a point of staring at the waste chute in the lead up to a clean, done this each day over past 3 days. Whilst the water does get right to the edge, nothing spills over before the clean commences so I don't think that is it.

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  11. #287
    Quote Originally Posted by Twhitenosugar View Post
    Nice looking pond and garden by the way.

    Looks like a nice place to chill out.

    Sent from my Pixel 4a (5G) using Tapatalk
    Thanks for the nice comment. We built the house 4 years ago and I soooo regret not doing the pond properly with a bottom drain but I had only just convinced my soon to be wife at that point that we need a water feature out the back of the bi folds. She agreed but didn't want me to get carried away. I had a digger whilst she was out so kept digging so got one that is 5ft deep. But didn't have the time or chance to do a proper bottom drain and gutted. Patio 2 years ago and then garden furniture about a month ago, finally come together!!

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  13. #288
    Senior Member Rank = Hassai Twhitenosugar's Avatar
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    Lol. Had a digger whilst she was out. Brilliant.

    It's that old saying. It's easier to ask for forgiveness than permission right? Draco Drum Solum 16 + Standard Bio review

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

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  15. #289
    Senior Member Rank = Jussai dbs's Avatar
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    That looks very nice indeed, hmmmm 1cm is a good drop, too much ror a low waterfall but evaporation could be a bit if in a windy location , as suggested by other drum wast Shute could be a prime contender

    Sent from my SM-G998B using Tapatalk

  16. #290
    Regarding pond levels and losing water, I too was convinced I had a leak however, this is what happens to mine.
    Overflow is in skimmer, set a knapsack cock below top of drum waste chute.
    When screen is clean everything is level. As screen gets dirty, the water level in the drum dirty side drops which means you effectively have only around have the surface area of screen available you had at ďcleanĒ.
    Pumps are therefore sending more water back to the pond than is flowing through the drum, pond rises, overflows.
    Drum cleans, everything settled back down again but your water level has dropped in the pond.
    Pain in the backside and also why quotes drum flow rates are a complete fabrication. Mine may be a ď35Ē but itíll only do that when the screen is perfectly clean. Which letís face it, thatís only gonna happen straight after a cleaning cycle.
    Might that be happening to yours?


    Sent from my iPhone using Tapatalk

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  18. #291
    Quote Originally Posted by bigcarpchaser View Post
    Regarding pond levels and losing water, I too was convinced I had a leak however, this is what happens to mine.
    Overflow is in skimmer, set a knapsack cock below top of drum waste chute.
    When screen is clean everything is level. As screen gets dirty, the water level in the drum dirty side drops which means you effectively have only around have the surface area of screen available you had at “clean”.
    Pumps are therefore sending more water back to the pond than is flowing through the drum, pond rises, overflows.
    Drum cleans, everything settled back down again but your water level has dropped in the pond.
    Pain in the backside and also why quotes drum flow rates are a complete fabrication. Mine may be a “35” but it’ll only do that when the screen is perfectly clean. Which let’s face it, that’s only gonna happen straight after a cleaning cycle.
    Might that be happening to yours?


    Sent from my iPhone using Tapatalk
    Possibly although if I've read and understood your situation correctly, I'm guessing you are gravity which means the pump is pulling the water out of your filter whereas I'm pump fed and therefore pushing water to the filter.

    But I do think it's something to do with the filter system. For two reasons.

    When my filter was cleaning every few minutes, my pond level went up and I'd have to drain out every few days.

    When my filter is cleaning a lot less often, my pond level goes down and I have to top up every few days.

    Also, earlier this year and with a similar issue happening, I turned off all the filter system for 48 hours just to see what the pond water level did. It didn't change at all suggesting the main pond itself isn't leaking. So it's either the water trough at the back, or the filter system.

    I'm fairly sure its the filter system, but for the life of me, I cannot see what is causing it. Water isn't going down the chute as far as I can see (unless cleaning) so the water must be going somewhere!! And with cleaning now only every 35/40 minutes, it's not cleaning enough to lose that amount of water per day.

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  20. #292
    Iím am gravity fed yes however the rise and fall of the pond due to the flow through the drum screen still stands I think.
    Do you have an overflow?
    Might be worth watching it for a while just in case if you do. at least you can rule that out then.


    Sent from my iPhone using Tapatalk

 

 
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