I've read about so many different possibilities of what it could be, but I'm still not sure.
Are they algae? Worms? Calcium deposits?
My red swordtail loves them and I suspect that's why the catfish is running his nose over the walls like that as well. Where the fish have been with their mouths, the glass seems clean.
This has been over the aquarium for about two weeks but I don't know if I should scrape it or leave it. It's slimy to the touch too and I presume it's all over the aquarium including the filter, as everything's slimy.
Also, the same swordtail poos somewhat white when eating that stuff while making black poop when eating bloodworms.
Are they algae? Worms? Calcium deposits?
My red swordtail loves them and I suspect that's why the catfish is running his nose over the walls like that as well. Where the fish have been with their mouths, the glass seems clean.
This has been over the aquarium for about two weeks but I don't know if I should scrape it or leave it. It's slimy to the touch too and I presume it's all over the aquarium including the filter, as everything's slimy.
Also, the same swordtail poos somewhat white when eating that stuff while making black poop when eating bloodworms.