Is this biofilm, detritus, or algae?

[AydenLincoln]

I turned my return pump off for a moment to add more water to my tank and all these white stuff came shooting out. Is it detritus? Mold? Biofilm? White algae? It came out quick and excessive or I would have put a net in front to capture it all.

 

[AydenLincoln]

Anyone?

 

[zbrusko]

I get that, too, sometimes. In my case I have lots of little sponges in my sump that i think get sucked into the tank. I also think there are mysis remnants that may settle in my piping & get blown out when the pressure/flow changes during restart. I always chalked it up to one of those things. Hard to tell from photo if we’re having the same issue.

 

[Idech]

If you feed frozen it’s uneaten food that gets spit out when you stop the pump. It does the same with powerheads.

 

[ga2040]

Yeah agree with uneaten frozen food that gets spit out when you run the pump with low water or restart. Usually gets filtered or caught in the skimmer. Shouldnt be a concern.