My setup is probably close to what you are explaining. 180g DT with 2 (29g) frag tanks that drain into 75g sump. Fuge is a 30g that is separate as well.
Only issue I have is pump strength.
If I were to do it all over again, I would purchase a separate pump to put in sump for just the DT. I am finding that when I turn on the second return line off the manifold, I get micro bubbles from that line.
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