Do I have the start of algae?? (22' AG Intex Pool)

[Jewlz]

Thanks kelemvor. I just checked my FC reading this morning and it is 3.5ppm right now which is up due to the dichlor I added yesterday evening I'm sure.

I forgot how much CYA is added with each bag of dichlor but I think it's like 9ppm possibly? Do you think it would good to add a 1 lb bag of dichlor again today to shock it and bring the CYA up some more? If my guess is correct that there is 9ppm in one pound of dichlor, then my 1/2 pound I added yesterday should of brought my CYA up another 4.5ppm so just about at 40 now. Maybe more than one bag? I'm not sure what the best CYA number is. I think I was told 40-50ppm possibly? Or should I just add bleach only to bring up the chlorine level?

Thanks,
Julie

[kelemvor]

Just keep in mind that adding dichlor and therefore CYA will increase the minimum chlorine level needed to both maintain and shock your pool. You would be better served to shock with liquid chlorine from a pool store (if you live in FL or CA where such things are common and cheap) or use plain unscented household bleach. Don't get the "splash free" stuff. The ingredients should be sodium hypochlorite. Very cheap from the grocery store or even a wal-mart.

How deep is your pool and what is your current CYA level? With the diameter and depth you can determine volume. That, the CYA level and the "%" of bleach (for example it might say 6% sodium hypochlorite) can be used to determine how much you'll have to add in order to shock.