Plumbing

Hello everyone,

I am planning a 120 gal FOWLR tank and am trying to establish about a 10x (1200gph) turnover through the sump back to the tank.

The question I have is are most reef addicts drilling their sump to attach a single external return pump (with an exact extra pump on hand in case of failure)? ... or inserting two smaller return pumps in the sump so in case one burns out the other will function until the problem is discovered (this was recommended by my ...