LifeTime Supporter
Mar 28, 2007
OK guys. I don't have any involvement with this company, I just tried their product and it rocks! It's called Scumoff. I have a fiberglass pool (almost a year now) and have fought my scumline. This stuff is great! I lowered my water about 2", brushed this stuff on with one of those 1" foam brushes, waited about 5 minutes, took a rough wash rag and wiped it, rinsed it with pool water and scumline totally gone. Dosen't affect the water (at least not within the hour following) and is so easy. I just thought you guys should know. I'll leave a link. It wasn't easy to find locally but I finally did. $14.08 with tax for a quart that should do my small pool about 5 times.



In The Industry
Mar 29, 2007
Knippa, Texas
So this stuff is easy to use? I may just give it a try! I scrubbed at my scumline with baking soda and it helped, but it was a LOT of work. I don't think I've seen a cleaner like that for fiberglass pools before; I've seen lots that are formulated for tile, etc., that warn NOT to use them on fiberglass.

I try to prevent a scumline; I use Pool Perfect. With an indoor pool, the enzyme treatment is almost essential.

chem geek

TFP Expert
LifeTime Supporter
Mar 28, 2007
San Rafael, CA USA
There isn't an MSDS for ScumOff, but]this old cached text link[/url] indicates that it is oxygen bleach. The MSDS for a similar product called Bring It On! contains silica (sand), Dodecylbenzylsulfonic Acid (DDBSA; an acid and a scale inhibitor), and Nonoxynol-9 (surfactant; yes, the same stuff used in condoms). If it is instead just oxygen bleach, then this is probably hydrogen peroxide or sodium percarbonate (which is a combination of sodium carbonate and hydrogen peroxide). So I wonder how just using hydrogen peroxide or sodium percarbonate would work.