OK, I'll start the #s input ...
If I remember wrong, someone should correct me
Basically, the amount of total flow needed for a FOWLR or lightly loaded LPS tank is around 10-15 times turnover/hr
An SPS tank needs 15-20 times turnover/hr or more
So, if your return pump is giving you 400g/hr in your 40g, you then need another 200g/hr with powerheads
Now ....
Where are all the answers needed here for the correct return pump flow in this 40g tank ??
