So I've got a large (35k/gal) pool with an algae problem here in Texas. Have dealt with it before by using my local pool store's advice and shocking with Chlor-brite. I just finished their shock regiment, but not seeing the same results. After some digging, found a lot of people recommending I stay far away from using chlor-brite as it raises CYA. Wondering what I should do... here's my stats before shocking:
Acid Demand 5
What I've done since:
-The lack of any FC alarmed me, and I first cleaned my SWG using 4 parts water to 1 part muriatic acid. It had been a year since I've done this.
-I added 1qt 24oz of muriatic acid first to drop the TA.
-Then waited 6 hours until the evening to shock the pool. I then added 4lbs 11 oz of chlor brite and swept the pool. I repeated this process 12 hours later, and again another 12 hours later for three doses. The last dose was added tonight, and while sweeping the pool, I was still seeing large patches of green coming of the walls and floor.
Previously I've never tested for FC or CYA, but just pH and TA. After reading here, I purchased a FAS-DPD kit, but it hasn't arrived yet-- So I'm assuming my CYA levels are limiting the effectiveness of the chlor-brite.
Wondering how I should proceed from here?
Sounds like liquid bleach is a better shock alternative. Should I go get tested again then use the pool calc to determine how much bleach to add?
What about the lack of FC to begin with. Should I be concerned my SWG isn't working properly?
Thanks in advance for helping this n00b.