Ed Fred Corporation 63817 16 Oz Shower Stall & Tile Cleaner

I owe a debt of gratitude to EdFred for making this product. Years ago I purchased a fiberglass pool that had been left out in a field and was stained with leaves and grime. This product easily melted the stains away from 99% of the pool without a lot of scrubbing - my only caution is to rinse off with water in the timeframe mentioned, per the instructions. What it didn't take off, Bar Keepers Friend did. The few bug/mold stains left after those two products were removed with Mold Armour (green bottle). Mind you, this was a dry empty pool - but if these steps don't remove all stains, nothing will. I later used EdFred for an acrylic shower pan and a fiberglass tub - it saved us a lot of work. I'm a fan...