Reef Central Online Community - View Single Post - 3/4" or 1" return

Regulator23 · 03/08/2018, 11:32 AM

thank you. I have 2 reef tanks (125G and 110G) that I am about to consolidate my fish and corals into a new acrylic 180. The 180 is peninsula style (viewed from 3 sides) with a single overflow box on one end. In the overflow box, there are two drain holes that will accommodate 1 1/2" PVC (I'll use 1 for drain and one for emergency) and a single return hole which will accommodate a 3/4" PVC. Here's where I need help.

Do you think it would be advisable to drill the return hole larger to accommodate 1" PVC? Both of my other tanks use 3/4" but I don't have nearly as strong of a pump on them (my new pump will push 4,100GPH at full power).

Not sure if it makes a difference, but I'm also going to run 2 MP40's from the same end of the tank. Flow shouldn't be an issue.

Anyway, that's one question/dilemma.

03/08/2018, 11:32 AM	#1
Regulator23 Registered Member Join Date: Jul 2016 Posts: 9	3/4" or 1" return - help please thank you. I have 2 reef tanks (125G and 110G) that I am about to consolidate my fish and corals into a new acrylic 180. The 180 is peninsula style (viewed from 3 sides) with a single overflow box on one end. In the overflow box, there are two drain holes that will accommodate 1 1/2" PVC (I'll use 1 for drain and one for emergency) and a single return hole which will accommodate a 3/4" PVC. Here's where I need help. Do you think it would be advisable to drill the return hole larger to accommodate 1" PVC? Both of my other tanks use 3/4" but I don't have nearly as strong of a pump on them (my new pump will push 4,100GPH at full power). Not sure if it makes a difference, but I'm also going to run 2 MP40's from the same end of the tank. Flow shouldn't be an issue. Anyway, that's one question/dilemma.