Why does my sump keep draining itself?

[ReefKing101]

The AIO filter at the back of my tank keeps getting lower and lower every day. Especially the last compartment with the return pump. Any ideas? If it’s evaporating shouldn’t it just come from the whole tank not just empty the sump?

 

[Plecosam]

Nah, evaporation will be seen in the return pump section.

 

[dreamcatcherr9]

Evaporation. It’s evaporating from display tank too, just sump is filing it back up so sump appears to empty first. And I “read” the return chamber empties first. ATO should go to return pump chamber.

 

[ReefKing101]

didnt think it was evaporation i can fill the tank to the brim and it will still be empty though

 

[Fishbro]

didnt think it was evaporation i can fill the tank to the brim and it will still be empty though

When the evaporation happens you have to fill the back chamber not the actual display

 

[vetteguy53081]

Slow your return pump down. I believe your pump is delivering water into the tank faster than can be delivered to the sump

 

[ReefKing101]

Slow your return pump down. I believe your pump is delivering water into the tank faster than can be delivered to the sump

That explains it, i took out the skimmer recently and shoved a ton of filter floss in the first intake, so that would make sense that the pump cant get enough water now. Thanks