We have been filling our 1700 gal Intex pool over the weekend. I read nearly all of the poolforum site and have taken pages of notes of notes. Now I have some questions. That site did not allow me to register. It directed me to this one. I am wondering if someone here can answer a question. I filled the pool to about 8 inches. After adding 1 1/2 cups of bleach the clear and clean water turned a dingy yellow. We have a filter system on our well that traps the silt, corrects for iron, and adjusts the pH. I am wondering if the color change is because of some iron that gets past the well filter. I have to fill the pool slowly, so as not to out run the filter. It is now about 1/2 full. I know I should get the good testing kit... but with this little pool I will try to make do with the 6 way drop kit. I added 2 oz of CYA today. I intend to finish filling by this weekend, then test. If it is the iron, I found TH brand of Metal Control. Will that work? How much should I use?