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In my grow on pond and my quarentine pond I first have settlement, then I have static ABM (Active Bed Media) which looks similar to K1 and acts exactly the same and is half the price. From there I have a trickle filter full of Matala and then a channel returns the water to each pond. I agitate the ABM with air for cleaning it and flush the dirty water it to a sump. My only change is that I want to add a couple of bags of oyster shells on top of the matala in each tower to assist with the PH buffering.
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