I was ill and free chlorine fell. Water was not green, but I noticed green all around the sides of the pool. I brushed everything down and back washed. I started slamming on 9/15/16. As of this morning, I am still losing 3ppm over night. I have been brushing daily and testing anywhere from 3 to 5 times a day. I am in DFW area and it is still very hot. Our pool is in full sunlight from 9 to 6 daily. I have to go out of town on Thursday, and I hate to think that i will have wasted all of the time and money if I cant get this in control before then. I am also burning through regents with all of the testing. I also reconfirmed my CYA level yesterday to make certain I was using the correct levels. My tests at the start of the slam process were:
FC 5 (I am filing to the 25 ml line and using 2 spoons of powder)
Borates Probably lowest to zero. Lost a lot of water to check valve problem, then had a lot of rain
I have been trying to maintain at FC 20 according to pool math. Occasionally I took it to 24 because of the full sun burn off expected.
I tested yesterday at 3:48pm and FC was 15 CC 0. I added 2-121 oz 8.25% bottles of bleach. It was more than required but I was leaving for several hours.
I tested at 9:20pm last night FC was 20.8 CC .4
I tested at 7.20am FC 17.8 cc .2
I feel reasonably certain I have mustard algae. I still see slight green on some of the water jets around edge of pool and spa. I have been brushing them daily and I do see improvement.
My question is should I just go to the mustard shock level of 39? I thought I read I should pass all test of slamming before the mustard level for 24 hours. At this point I not sure I will ever pass the overnight level. I have gone through more than 20 bottles of bleach at this point.