Trichlor not safe in fiberglass pool??

[tbrummel]

I've been reading up on the chemistry of the different chlorine compositions to determine what to use when I can't get liquid sodium hypochlorite (thanks ChemGeek) and ran across something odd: The link below is to a granular trichlor product - which sounds like the stuff people are using in their pools. However, there is a warning with it that reads "Do not use in painted, vinyl-lined, fiberglass or colored plaster surface pools." Umm.... really?

Anyone have any insight?

GLB Spot Gone II Granular Tri-Chlor - 2 lb - $12.99 - America's SPA-MART

 

[jblizzle]

Trichlor is slow to dissolve. If you throw granules in the pool, they will sink and sit to the bottom. They are also acidic and can damage the surface. They should not be thrown in ANY type of pool.

Dichlor powder dissolves more quickly (quick brush and should be gone), but also increases the CYA faster.

Or stick with Trichlor tablets in a floater if you can't get bleach ... watch for those Menards sales

 

[Donldson]

Trichlor doesn't dissolve very quickly, so if you throw it in to a pool it will fall and sit on the bottom. Being that it is a highly acidic form of chlorine it will very quickly bleach out anything it sits on as well as damage the liner/fiberglass/plaster.

I can think of very few situations where I would use trichlor powder. Trichlor really is best in tablet form. Calcium hypochlorite and dichlor are better as powder, with the usual caveats that go along with them of course.