What is a good size SUMP Tank for a 55 galloon Tank? new to all this.:sad:
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I would say you'd be fine with a 20. I have a 10g on my 50 cube and zero nitrates. I believe bigger can be better but it's more what you do with it!
My 75 (( which will be taken down in the near future )) has a 20 long, as does my 65. Has worked perfectly for me. Prefer the "long" over the "high", more linear room.


