Quote Originally Posted by steveinaz View Post
Evan, would that be like Jack's Pink Stuff? They have so many products, it's confusing...
Pink stuff or purple stuff or blue stuff, either is good. Purple stuff is made for salt pools but I have never noticed a difference.
blue stuff has a higher chelation index for copper than pink stuff but both are about the same for iron. Often you can just get a store brand sequestrant that is HEDP and save a bit of money. They work just as well, IMHO.
Let me back peddle a little bit. I finally did the the vitamin C test correctly this time, and it did in fact remove the staining after about 10-15 minutes. This was a relief, as the staining is fairly light, but does cover probably 85% of the pool. This "epiphany" reminded me of the first year of the pool, the PB had to come out and clear a clogged drain (sponge left from construction). His weight (diving) belt had a tear in it---about 3 days later I noticed little balls in my pool, that left behind red rust stains. Could this have been the source of the iron? We're on city water, and the quality seems to be quite good...
Very possibly that is the source of the iron stains.