We purchased a new house (this is how all the threads start huh!) at the end of last summer.
it was green/black, and we opted to drain, refill, & replace all the sand. at the advice of the local pool store (I've noticed most of the threads also include this nugget) I used dichlor to shock as needed and tabs through the auto feed thing on the motor. everythingwas fine until the end of March.
we have many live oak trees in our yard & March is the start to leaf drop season. Since then I've been fighting pollen & algae. Adding dichlor weekly & added a pool floater w/ tabs because I thought the sun was eating up all my FC, and the pool store recommended it >.<
I finally thought I had everything perfect. And then another algae bloom, because if my inability to keep any FC in the pool, the location, & look, I thought it was mustard algae. So I just finished adding DE to my filter, yellow out & shocked. Since then the pool had been algae free but the FC was still so low. So I start googling and learn about CYA. I assume my CYA must be thru the roof considering how much dichlor & tabs I've been using. I stopped the tabs & dichlor & added liquid bleach and was able to get my FC up to 3 ppm.
when I went to brush the deep end a white precipitate came off the bottom and made my water cloudy. 2 days later I still have not added any more chlorine as my cheap test was showing it staying at 3ppm.
I backwashed last last a couple of days ago and did not add anymore DE just in case that is the precipitate.
My water is still cloudy and my new big Taylor kit arrived today, so as of this evening here is the results:
CYA ZERO (how is that possible!)
im guessing I need to shock since my CC is at 2, but should I add a stabilizer before I shock? can my CYA results be right?
after I saw that my CH wasn't high, I went ahead and added a clarifier hoping to de-cloud the water, but it did nothing 6 hours later.