I used a similar product, " Red Slime Remover" by Ultra Life, maybe the same stuff. It worked great. It was a poweder you mix with a bit of tank water then just pouor it in.... it was fairly expensive as well, about $30 but I still have lots left for future use if neeed. It is supposed to be invert/reef safe, I hd no ill effects. Also discolored the tnak for a few days but I was very impressed with how well it wrked. Been a couople of months now and have no sign of any Red Slime sice
Great product !!