My 300 gal tank has two weir over flows with Herbie style drains where the opening to the drain pipe is set fairly high. On a hunch, I used an endoscope to see what was collecting at the bottom of the weir.
Concerned that this might be a giant source of nitrates, I put a cheap, low flow powerhead in each weir to ensure nothing else settled.
My question is what do other people do? Is there a way to get good circulation through design of plumbing? And, is it even something I need to worry about?
Thanks in advance!
Concerned that this might be a giant source of nitrates, I put a cheap, low flow powerhead in each weir to ensure nothing else settled.
My question is what do other people do? Is there a way to get good circulation through design of plumbing? And, is it even something I need to worry about?
Thanks in advance!

