I have an 85 gallon reef I’m building a sump

[BostonBill678]

A friend gave me a 3 compartment acrylic sump that is 36 inches long and the compartments are 1 foot by 1 foot by 1 foot by 1 foot and 12 inches high what size pump and overflow do I need . I read I think that your sump pump and overflow should be 5 or 10 x your tank If it’s 5 times that’s 475 gpa if its 10x 8500 .See I think that pump is way to big . Does anyone know how big of a pump I need ? I was thinking under 1200 and a 900 gph overflow ? Little help anyone?

 

[Zirky]

You have to consider head pressure if your sump is directly under your tank and you have a few elbows, t’s ect you could easily loose 1/2 your pump rating if not more.

 

[Reefer508]

CPR CS90 overflow, rated up to 600 gallons per hour, link to it at BRS: https://www.bulkreefsupply.com/deluxe-cs90-overflow-with-lid-and-air-pump-cpr-aquatics.html

Controllable DC return pump that is rated a little more than your overflow that you can dial down to match flow like this: https://www.amazon.com/Hygger-Subme...pY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&th=1

That's what I would use on a tank that size.

 

[BostonBill678]

You have to consider head pressure if your sump is directly under your tank and you have a few elbows, t’s ect you could easily loose 1/2 your pump rating if not more.

It’s directly under my tank

 

[MikeG]

Do you have the option to drill the 85 or is it already up and running?

 

[BostonBill678]

Already up and running with fish and corals