Maybe you misunderstood my post...
My "Test" system with 3 Trays works perfectly with using ONLY Lava Rocks. And I'm sure as I replace the Lava rocks with BHM I will see it's full potential.
1 Stack 4-trays will handle up to 5,000gal and duals will handle up to 10,000.
This comes right off
http://www.keirinponds.com/filtration.php web site who sell the Bakki Showers here in the USA and also talking to John MacDonald of Keirin at a Koi show in D.C. earlier this month.
Now my "Better Half"(LOL) says it NEEDS to be bigger! Oh well, She has completely fell in love with Koi keeping. I've always had fun rearing all sorts of aquatic life.
A Note... I also am put off by all the BH and BHM bashing. Yes, we all have our Opinions but ripping apart a product without any evidence showing it doesn't work is just as bad. So if your motives are negative or trying to counter-sell I'm not buying and I'm SURE others here aren't as well.
We will be putting up our own site showing the Progress of our construction and of course... our Koi. I will keep you all informed for the URL!