With a valve I can reduce the flow to a trickle if I wanted .. No ?
Welcome to the club! For a 55, I think trying to flow 700 GPH through your sump is too much. As a general rule, I try to shoot for 5X the tank volume, 10X the sump volume. So you would likely want between 200-250 GPH. For that, a DC12000 would be WAY oversized. I am using that on my 125, and I run that at 50%.
I can reduce the flow with a valve .. Can't I ?
The overflow kit was rated for30-60 gal .. Gl**************.com 700 in and out kit
This is my first go at it .. And the 55 was free .. No need on spending a lot if I'm not sure I'm even gonna be into the hobby in a year ..a low cost 55 is better than no reef tank at all