Thought I was missing something here...but this methodology went the way of the 2lb cell phone...much has been learned/improved since the 80's as noted above. I would recommend investigating what many others are doing with their sumps on this board, and others boards, and I am sure you will find this practice is not used any longer. Not saying you can not achieve your goals using them, but I would research further. Cheers.
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Originally Posted by Gizmo
supposidly it has more surface area and better flow for the nitrifying bacteria to attach to. And it takes up way less space
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