It is a brand new tank. I haven't tried anything yet. I don't currently own an algae scraper yet as I thought it would be a while before I'd need one. I could get one and give it a go, but I was thinking maybe even just a cloth that won't drop fibres in there?Hello and welcome to R2R . Is this a new tank or did you get it used ? Have you tried an algae scraper of any sort on the white marks ? As for the frozen food I feed nothing but. I buy it mostly in cubes and cut what I think I need off a cube , add some Selcon , thaw and feed
