Petruchi's thread -- Pool floor stains

[petruchi]

Thanks for the reply!

We worked at it with a grinder with a 60 grit pad, and it does the trick. We have a 5/8" layer to work with, and the grinder does a pretty good job (with a steady hand!) at taking off the top layer. It almost appears that it's calcification, it is so much harder than the surrounding plaster.

We have had no success with chemicals at all, without getting drastic. Acid scares me, at least with the grinder we have some control.

Thanks again!

[PoolDoc]

Yeah.

I think, if you have 5/8" thick plaster, the grinder will give you the best and most durable results.

You might, if you feel like tinkering, use white epoxy paint or something to build up the outer lips of of your in-floor return, so that the water flow does not directly impact the plaster. Otherwise, if you still have iron in the water (steel tank sand filter, maybe?) the stains will return.

Ben

[petruchi]

Good advice, thanks. I think it was a problem of chemistry in that first year, as the stains never got any worse after the first year.

Appreciate the help!