Please refer to the attached chart to determine your approximate drain capacity.
As you can clearly see, a 1.5" drain can pretty easily handle AT LEAST 700gph BEFORE siphon effect.
1' drains, on the other hand, which I think is what the megaflow is, begin to have issue at ~300 to 350gph
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Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer
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