Check valve question

[Glob55]

Starting my 75 Gal SC aquarium build out. Are any of the attached check valves any good?

 

[Coral reefer]

Just design it so you dont need one

 

[Turkeysammich]

Check valves are gimmicks. They never work unless you constantly maintain them. Plus they slow flow like crazy.

 

[Slingfox]

No check valve needed for reef tanks. The sump should be able to accommodate any drainage of water from the display tank when the return pump is powered off.

 

[MichaelB]

No check valve needed for reef tanks. The sump should be able to accommodate any drainage of water from the display tank when the return pump is powered off.

+ 1. To sump should have enough space to contain water during a power outage.

I would add it's best to purposely trigger a power outage to return pump as in unplug it or turn off power to it, to ensure that sump can contain the extra water.

It's a very important step when setting up a newer tank. It helps you determine the sumps water line, and give you confidence you won't flood your house during a power outage. It's definitely not something you wanna find out when one actual happens.