I have been reading tons of info on the www to try and figure out what went wrong last weekend and have gotten lots of answers but I need some help with the solutions. My husband and I bought a home with a 16.5 gal inground pool this year and it has turned into an enormous money pit (will try to spare you ALL the details, but this is going to be a bit long).
We had professionals open the pool on 4/24 and after discovering an inoperational DE filter they put a new sand filter in on 5/1. Note, between 4/24 and 5/1 we added at least 6 inches of well water to pool. Got filter running, vacuumed, and water looked great until this weekend! We used the tri-chlor pucks the previous owners had for chlorination. The pool store people told me to put 3 in each skimmer, and to replace when they were dissolved. They also told us to shock so I added a container of that. We were worried about all the maintenance and dealing with chemicals and heard SWGs reduced it.
After reading all of the great reviews on internet decided to purchase one online at this link http://shop.saltpoolinstaller.com/produ ... roductId=6. Husband intalled it on Sat, 5/17 without a problem. Upon advisement from salesperson from where we bought SWG, we purchased salt from local feed store (note - we asked to be sure there was no anti-caking agents or iodine in salt). They said not, although bag said 99% pure (big mistake!). Poured 600+lbs. of salt into pool and within hours water turned a green hue and massive rust colored stains formed all over pool surface.
First poured some algecide (1/2 gallon) in pool (just a quick gut reaction to green water, although I am sure algea wasn't the problem so I wish I hadn't done that!). Went to pool store on Sun and bought 3 bottles Jack's Magic (the blue stuff), and some lo 'n slo after testing our water and seeing high FC (9.5) high pH (7.7), high CYA (151), fine TA (91), and no algea. Added the blue stuff and low 'n slo, had the SWG running at 70%, then went on internet and started reading. Learned of the absorbic acid treatment to rid of the iron stains. Since I needed to lower my FC levels for the ascorbic acid treatment, the next day I lowered the SWG to 10%.
Tested water again next day with strips but FC still appeared very high (dark purple, 10ppm). Waited another day, tested again, no change, but pH was looking on low side according to strips, which made sense given all the rain. I didn't adjust pH because I thought the ascorbic acid treatment would do better with low pH anyway (not sure on that though). Lowered SWG to 0% in efforts to get FC down in order to do ascorbic acid tx. That night (yesterday), I came home to green tinted water! The rust stains have not changed a bit even though pool store said the blue stuff would help after a few days (after reading pool forum advice I figured it was just a sequestering agent and would not remove already precipitated ions from pool surface, but hoped I was wrong).
More reading taught me with my stabilizer so high, my chlorine probably won't change, and it should be at that level anyway. So did I screw up by turning SWG output so low? I assume the green is copper, perhaps from the salt impurities? Why didn't the sequestering agent keep it at bay? Are my TDS too high and due to the saturation, the sequestering failed? Did this happen because I had the SWG at 0%. I turned it up to 60% today and I am taking my water back to store for testing after work.
Any advice on how to get a handle of all these issues? I need both short term solutions and long term maintenance advice. I am having a picnic on Sunday and was hoping to have a clear pool free of rust stains by then!
Sorry for such a long post, it has been a saga!
TIA for suggestions!
[Edited by SeanB to insert paragraph breaks for easier reading. ]