Hello all, so I'm setting up my 125 gallon tank and I'm putting ceramic tile for the bottom BUT I've noticed that at the bottom of the ceramic tile there is a white residue. I tried cleaning it off but it's not working. I got the idea to do tile from "King of DIY" and he too had the residue but he said all he did was give a quick wash and he was done. Has anyone had this problem, how did you fix it?
Thanks,
Thanks,
