Minimum Flow Through Sump?

[klasiksb]

I'm trying to get a general idea of what kind of flow you big tankers are running through your sumps and why you chose the flow you did.

Planning a 300 upgrade and was thinking 1000-1200gph through the sump.

 

[Elliott]

you're in the range, generally 2-5 x tank volume

 

[xenon]

You don’t need much.

Some of the European setup use less then 1X tank volume per hour.

Personally, I like the idea of plumbing your overflow directly to a recirculating skimmer first. Then just adjust your return pump with a ball valve until your skimmer is perfectly dialled in.

 

[bag151]

Depends on what you are doing in the sump, faster the flow the more contact your skimmer will have with the nutrients its exporting. 2x-5x is a pretty good number, but when you have a really large tank turning over that kind of flow gets a lot harder and will reduce the efficiency of the nutrient export.

 

[Po-vegas reefer]

2xs-5x 5x being the max I would say