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RWB3
10/02/2017, 08:53 AM
What size returns should i install on 75 gallon 1/2 or 3/4. Also will be using two return lines. Prob will be using a 1262 eheim (900gph). I will be using a 16" shadow overflow.

mcgyvr
10/02/2017, 11:01 AM
same size or 1 up from whats on the pump.. I'd probably use 1" but 3/4" should be fine too..