I need to remove some old hard water stains from my new (used tank). I have tried the algae scrubbing pads, and a metal scraper. What is next. I need to get this tank going this weekend. Thanks Zach
Try a razor blade if the tank is glass, usually works great for me.
Blue
That would be my suggestion, too. You can use all acids, but in the case of vinegar the risk of harming yourself is quite lowVINEGAR VINEGAR!!!!!!
WHITE VINEGAR!!!!
Water stains gone like magic...............