Quote Originally Posted by Sir Patrick View Post
Heres a head loss calculator-

Captive Reefs - Head Loss Calculator


and a drain/overflow calculator-

Captive Reefs - Drain & Overflow Calculator


These will help alot.

I see that under 1000 gph is a good max for a sump, for the skimmer to do its job, but I am wondering what minimum GPH most recomend for flow through GPH should go through the sump.

What are the drawbacks/advantages to a faster or slower flow rate through a refuge?

That's a good question and only have my own theory of it.IMHO a fuge is just what it it's called a refuge so haveing equal size panels in the fuge zone will create an even water level and allow for an area for pods and cheato and what everelse you choose to grow to do their job.I really don't think the gph flowing in to the sump/fuge play's that big of a factor as long as the fuge area is fairly calm.Just my crazy thought's on it.As long as the drain flow doesn't exceed the skimmer your good in my book.Rember I'm alittle off key on this subject I won't even use cheato except to feed my tang a treat lol