Looking to ID Algae in Sump

[DKoKoMan]

Originally Posted by DorySaid

It's definitely bacteria. I seen it before in my holding tanks while setting up my current display.
I believe the actual color of that slime is originally translucent but probably with all the gunk running through, gives it a brownish tinge.

Ok well thanks for confirming as I was initially thinking of an algae. Now my question is for my new tank build is it worth getting rid of NOPO-X and will biopellets be sufficient.