Thanks for responding Watermom and PoolDoc! Sorry it took me so long to reply back. I couldn't find my original post when searching for it.

Watermom: I have a Intex Ultra 16' x 48" above ground, (5,061 gallons). It has the round accordian paper type "A" filter. I don't know what these are called. The pump is 1,500 gph (per Target's website), also by Intex. The SWCG is Intex Krystal Clear. All I have added to the pool is about 125 lbs of salt and 1/2 lb of cyuranic acid. I did add a gallon of bleach to it while I was filling it up to keep it from getting nasty before the water got up to the inlet of the pump. Since then I have not added anything. You are correct, I have only been using a OTO kit. I have been debating on whether to buy one of the Taylor kits. I am wondering if something other than my chlorine level may be the culprit. Amato is evidently out of the K-2006 kits today, I will check back the end of the week.

PoolDoc: I filled the water from a well so iron could be a possibility. I will test the water tonight and re-post. I do know that the inside of the tank is brown. It is not as bad as some other toilets as I have seen, but it is brown. I started having toilet trouble while I was filling up the pool so I remember very well what it looks like. I don't have a water softener installed. Is there somthing that can be added to the pool water to remove or treat it for the iron?

Thanks again for your help.