I have what looks like small bubbles on the back of my nano cube 24 gal. I can't get a good pic. I can scrape them off but not sure if I should. All is good in my tank. Up and running for about 6-7 months, good coraline growth, fish and coals are doing well perams are all in range only mg is a bit low. Any ideas? I will keep trying to get a photo.
Thanks! Got an OK pic. doesn't look good:O(