stains

I setup my tank last Saturday with water, rock, and sand. The tank only had dry rock, dry sand, and ro water. I drained it to do some leveling and noticed stains all over the glass. Especially around the waterline. It won't come off with wiping or vinegar... Any idea what it is / how to...

Hello Reefers, I needed to increase my pH so I got some soda ash and made a mixed solution with RO water. After letting it sit for 12 hours I decided to add it to my tank. My tank was cloudy for a while and had some remains of soda ash that didn’t completely dissolve. The water cleared but...

Hi everyone. Im cleaning my old aquarium to sell and there are these hard water stains above the water line left over after cleaning with razor blade. This is what I have tried: 1) vinegar soaked paper towels x 45 min - no change 2) Mr Clean sponge - no change 3) Soap/water - no change I...

Have some BRS 2 canister setups for carbon and gfo. The gfo sat in the canisters after the tank was down. Short of scraping is there a way to chemicaly clean the brown scum that is on the canisters? Thanks