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  1. #1
    Senior Member Rank = Mature Champion smartin's Avatar
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    Adding Jap matting to shower.

    Good evening,
    Spent this weekend disingfecting all of the shower media ready for Tuesdays install, I have some new spare jap matting and was thinking of adding this ontop of the crystal bio which is the top tier of the shower, now there should not be too much in the way of debris as the shower will be on a return after the drum however have read that some put the matting on the top tier so is this advisable ? Will get some celotex tomorrow to make an insulating cover.... hopefully Tuesday all items will be installed, we had a good look today and it would appear that the 20k vario aqua forte was installed by the pond builder and then all pipe work was glued / connected which has trapped the pump within the pipework so pleased i am changing these over as if this pump failed i would be in a right old pickle, looks like the 4" high pressure pipe will have to be cut and re routed to a more sensible location for the new pump....quite amazing!!


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    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
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    Skimmer trickle.

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  3. #2
    Senior Member Rank = Mature Champion davethefish1's Avatar
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    i don't think it would hurt to have the jap matting on top of the shower mate,
    it might even help spread the water from the spray bar output a bit.

    but i think it would have very little contact area for bio as the spray jets would run straight through it.
    probably why most shower media has a porous capilliary action to spread the water.

    not good re the pump being trapped within the pipework
    but i hope it all goes smoothly for you on Tuesday

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  5. #3
    Not sure about the Jap Mat but I wouldn't bother (and haven't). One observation is your BHM (or whatever variant it is) is stacked neatly, the consensus is it does much better just chucked in the tiers in a hap hazard manner.
    34,000L, 2xSpindrifters, Aqua Sieve2, Nexus300, 24in K1/bead, Momotaro Bakki, 17kwThermotec Inverter

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  7. #4
    Senior Member Rank = Mature Champion samp09's Avatar
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    I can't see it doing any harm personally, if it takes even more fines/crap out then happy days

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  9. #5
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Agree with Mal above mate,stack it irregularly so I have been told and yes jap mat is good above.

    A tip I use is to make a piece of plastic say from the bottom of a plastic box to fit loosely on top of the media,drill some large holes 1/2 ins or more so that the water spreads more evenly over the media,you can put jap mat on top or floss even better it works very well mate.
    John

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  11. #6
    Senior Member Rank = Mature Champion smartin's Avatar
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    Hi guys not sure i would get all the media back in if it was stacked irregular, Horses for courses isn't it i think on the media, some say stacked some say throw it in lol, i was speaking to Andy from Burtons about this at the koi show, he said throw it in if you cannot afford too much media as it takes less space or stack it if you can afford it, the shower came like this and the dealer who had it prior was happy with it and had been advised to stack it lol so i just kept it the same..... i suppose its all about surface area does thrown in offer more surface area compared to stacked as it will occupy more of each tier space wise or visa versa ?? can anyone out there throw some light on this matter with some clever equation.....answers on a postcard
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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  13. #7
    Senior Member Rank = Mature Champion smartin's Avatar
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    Quote Originally Posted by john1 View Post
    Agree with Mal above mate,stack it irregularly so I have been told and yes jap mat is good above.

    A tip I use is to make a piece of plastic say from the bottom of a plastic box to fit loosely on top of the media,drill some large holes 1/2 ins or more so that the water spreads more evenly over the media,you can put jap mat on top or floss even better it works very well mate.
    Hi John,
    thanks for the tip, i will see how much water is ejected by the 2" spray bar and if it covering the media adequately if not thats a good idea to help spread the water, assume it will need to be dead level to be effective...
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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  15. #8
    Senior Member Rank = Mature Champion smartin's Avatar
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    Quote Originally Posted by MalNorwich View Post
    Not sure about the Jap Mat but I wouldn't bother (and haven't). One observation is your BHM (or whatever variant it is) is stacked neatly, the consensus is it does much better just chucked in the tiers in a hap hazard manner.
    Thanks Mal, its BHM and crystal bio...
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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  17. #9
    Senior Member Rank = Mature Champion smartin's Avatar
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    Quote Originally Posted by davethefish1 View Post
    i don't think it would hurt to have the jap matting on top of the shower mate,
    it might even help spread the water from the spray bar output a bit.

    but i think it would have very little contact area for bio as the spray jets would run straight through it.
    probably why most shower media has a porous capilliary action to spread the water.

    not good re the pump being trapped within the pipework
    but i hope it all goes smoothly for you on Tuesday
    Cheers Dave,
    i will try to get a photo of pump prior to cutting pipes, yes i hope it goes ok too as the plumber has lots to do in the one day including changing the over flow system, the pipework installed is too small a bore and at times if a few pellets go down together they get clogged up in the bend and then it back fills and goes everywhere but the overflow - another gripe i have....
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Hi Steve,
    It seems logical to do it the way you have it nice and neat and to get more in but I am only going by what I have been told,I have even been told that you dont need loads of media in there,weird

    Yes the spreader plate works great and does need to be quite level I put some floss over it as well,but you may be ok with just Jap mat if you have some worth trying Steve.
    John

  19. #11
    Senior Member Rank = Mature Champion smartin's Avatar
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    Quote Originally Posted by john1 View Post
    Hi Steve,
    It seems logical to do it the way you have it nice and neat and to get more in but I am only going by what I have been told,I have even been told that you dont need loads of media in there,weird

    Yes the spreader plate works great and does need to be quite level I put some floss over it as well,but you may be ok with just Jap mat if you have some worth trying Steve.
    Hi John,
    i have floss so will put some on top of jap matting too, the spreader plate might be a pain to get level as crystal bio not the easiest of stuff to get level but will defo give it a go if the 22k vario pump does not pump enough water around...... ref the media it was a comment made by Andy regarding the cost of the expensive stuff if you toss it in you wont need as much compared to block placement thus keeping your purchase costs down... i will let you know how the ASHP goes, now i am paying extortionate electricty rates i am praying its economical else i will be in trouble with the wife
    2200 gallons, infinity window, BD
    Evolve 4000 combi amalgam UV
    10k,20k AF pumps
    Skimmer trickle.

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  21. #12
    Extreme Koi Member Rank = Sansai AntB's Avatar
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    The theory behind the media not stacked and being haphazard is to prevent water tracking between the media rendering it ineffective.
    6,000 gallons, aerated bottom drains, Duratec heat pump, Profidrum, Biomax 50, Bakki shower

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  23. #13
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Quote Originally Posted by smartin View Post
    Hi John,
    i have floss so will put some on top of jap matting too, the spreader plate might be a pain to get level as crystal bio not the easiest of stuff to get level but will defo give it a go if the 22k vario pump does not pump enough water around...... ref the media it was a comment made by Andy regarding the cost of the expensive stuff if you toss it in you wont need as much compared to block placement thus keeping your purchase costs down... i will let you know how the ASHP goes, now i am paying extortionate electricty rates i am praying its economical else i will be in trouble with the wife
    Floss will stick to the matting I think when you take it off at least I found that.

    Yes Steve let me know how you get on with the ashp,that one you got is expensive
    John

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