Algae (?) In sump ID

[BHReefer]

Hi all. I have a yellowish to reddish algae growing in my sump. It seemed to start after dosing phyto in the sump. It's only growing on the silicone (I assembled my own sump baffles). Used GE silicone. Water parameters are spot on with phosphate a little higher at 0.1ppm. Tank in it's existing format is 6 months old but I began cycling rock etc a few months prior. This algae will not run off easily like diatoms or cyano. It ia not present in the display tank. I have no significant other algae issues in the sump or display tank. The sump is in the basement where I start garden seeds, there are grow lights but not directly on the sump.

 

[blaxsun]

Not a clue.

 

[Ro Bow]

Hi all. I have a yellowish to reddish algae growing in my sump. It seemed to start after dosing phyto in the sump. It's only growing on the silicone (I assembled my own sump baffles). Used GE silicone. Water parameters are spot on with phosphate a little higher at 0.1ppm. Tank in it's existing format is 6 months old but I began cycling rock etc a few months prior. This algae will not run off easily like diatoms or cyano. It ia not present in the display tank. I have no significant other algae issues in the sump or display tank. The sump is in the basement where I start garden seeds, there are grow lights but not directly on the sump.

that is insanely strange

 

[BHReefer]

that is insanely strange

I can run it off and the silicone is still clear, has not grown back yet but other parts are still growing.

 

[Ro Bow]

I can run it off and the silicone is still clear, has not grown back yet but other parts are still growing.

It is most likely some sort of sponge. @vetteguy53081

 

[vetteguy53081]

It is most likely some sort of sponge. @vetteguy53081

Sponge and slime it is. Take a PLASTIC putty knife and scrape straight down and it should come off in a sheet and disacrd.

 

[monkeyCmonkeyDo]

Looks like mold. Lol
Could be the beginnings of cyano.
D