BAT Posted March 28, 2022 Share Posted March 28, 2022 Anyone know what this is? I wiped it off about 10 days ago amm 0 Nit 0 Nitrate 10 planted 10g w gravel Link to comment Share on other sites More sharing options...
colo3000 Posted March 28, 2022 Share Posted March 28, 2022 It looks like biofilm with marks from a snail or some kind of sucker fish running through it. 1 Link to comment Share on other sites More sharing options...
Jennifer V Posted March 28, 2022 Share Posted March 28, 2022 I had the same on my tank glass for a short while. It eventually went away on its own so I assumed it's just harmless biofilm. 1 Link to comment Share on other sites More sharing options...
Guppysnail Posted March 28, 2022 Share Posted March 28, 2022 (edited) I say biofilm as well. Those look like identical track markers my nerite makes when I upgrade his tank size. I wipe it off the front but allow it to stay on sides and back glass as long as it takes to vanish of its own accord because it’s an easy food source for my nerite. Edited March 28, 2022 by Guppysnail 4 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now