What are these? Starting to take over glass

[Brookles]

 

[CRath]

Do they grow back if you scrape them? Otherwise it looks like normal glass crud.

 

[vetteguy53081]

hard photo for detection as these are side shots. if theyre moving- Pods which are a free food source for fish and coral. if stationery, Pineapple sponges which are likely thriving from silicates in the sand, water source or RO unit di cartridge especially if new. These are NOT long lived . You can scrape off into a net with the edge of an old credit card

Pinapple sponge:

 

[BeltedCoyote]

Looks like pods or sponges

 

[Brookles]

I clean the glass weekly and they reappear within 2-3 days but not in the same spot. They seem to come back stronger every time I clean them off. The last 2 weeks they seem to have doubled. I thought they were stoma snails but now I'm not so sure.

 

[Brookles]

hard photo for detection as these are side shots. if theyre moving- Pods which are a free food source for fish and coral. if stationery, Pineapple sponges which are likely thriving from silicates in the sand, water source or RO unit di cartridge especially if new. These are NOT long lived . You can scrape off into a net with the edge of an old credit card

Pinapple sponge:

Thank you!!! That's 100% what they are. Just noticed bigger ones in the filter compartment that look just like that. I was having a heck of a time IDing off the internet.

 

[vetteguy53081]

Thank you!!! That's 100% what they are. Just noticed bigger ones in the filter compartment that look just like that. I was having a heck of a time IDing off the internet.

Yes Pineapple as they favor darker areas and shaded areas.