FYI : GREAT cleaner

[Briguy]

Any idea if it will remove waterline stains from gelcoat or if it helps with slime or barnicles?

[RS]

Any idea if it will remove waterline stains from gelcoat or if it helps with slime or barnicles?

Waterline stains, rust, leaf stains, etc are most easily removed with an acid based cleaner like On and Off, toilet bowl cleaner, barkeepers friend, etc. TSP is an alkaline based cleaner.

[Scott]

Abl ...Negatives of that stuff are that it is not very environmentally friendly ... Phosphates are bad and can wreak havoc on marine life. One of the guys I worked for had intimate knowledge of stuff like this is the environment, so he was always super critical of what we washed into the water. I have a large saltwater tank and if the phosphates climb too much it can choke the life out of my corals. I’ll grant you the amount your using should be small …but cumulative effects can create cumulative problems ….

That said a lot of the stuff we use is pretty nasty ...