This stuff works like a charm. I have a white Chapparal so it shows the water line quite easily. I have tried numerous other hull cleaners and some a quite caustic and others not so effective, but NONE clean the bottom as quickly and effortlessly as Bio-kleen. It quickly removes any scum and mineral deposit from the hull and leaves it absolutely white and like new.

Great product removed brown stains instantly

upon instruction as given, it exceeded my expectations. must use a little patience to let it work. my aluminum hull had set in the water for 7 seasons without any previous cleaning.

hull kleen did all that i was told by customer service, TOM !!

It worked great my jet ski looks new I would buy it again

I've had severe build up of crud on hard to reach surfaces in my car wash. One of our team members brought in a small amount from home and tried it out. The crud is now history.