Jeff Posted December 28, 2022 Share Posted December 28, 2022 (edited) I took Corey's advice from one of his tips videos. I added a never clog air stone in the back of my AquaClear HOB. I haven't noticed until now, but it has created a black mark on the wall behind it. This hasn't come about until I added the airstone. Why would an airstone do this, and any tips on stopping this from happening after I paint over it? Note: I keep the lid loosely on the HOB. The pic of the HOB is just for reference Edited December 28, 2022 by Jeff Link to comment Share on other sites More sharing options...
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 account
Already have an account? Sign in here.Sign In Now