Last summer, we moved to a new house with a 36,000 gallon gunite in ground pool. The water in it was fine last season and we didn't have any chemistry problems. We DID have major cracks that were causing water leakage, and were "fixed" this spring. The company chiseled them down, patched with hydraulic cement, and were also going to re-plaster, but they were so big that they told us to wait a season on the re-plastering to make sure the cracks/leakage were actually fixed. This has been a longer than it should have been process, but we are finally at the opening stage for the season.
We have iron in our water, and of course we used it to fill the pool, not realizing it until we had already filled it. I am ready to fire up the filter today and get everything running. My main question is, do I get the Jack's Magic and use it PRIOR to balancing and chlorinating, or do I use it after balancing and chlorinating? I use the BBB method, and just want to go about this the proper way from the beginning, if I can. Also, is there a place besides a pool store that will test water for iron? Or should I just bite the bullet and get my own iron testing kit? (I have a good Taylor test kit for other chemistry). With a pool this big, I'd like to keep the costs of sequesterant down as low as possible, so I imagine I should know how much I need in the water based on the amount of iron or other metals present.
Our former home had a nice, little 18,000k IG fiberglass pool with a simple setup, with which I was familiar and which I could get under control easily if things went sideways for whatever reason. This pool intimidates the heck out of me. It is HUGE, the set up is very different, the filter is DE instead of sand, the water here is different...I'm just a bit skittish. Any help would be appreciated.