Hello, I am a first year pool owner and I have a 25,000 gallon IG pool. I have been having trouble all season. I got the pool clear but it starts to get cloudy around Tuesday every week. I shocked the pool on Monday night, by Tuesday evening their is no chlorine. I shocked it again on Tuesday night and by Wednesday evening their is no chlorine. I keep getting algae, I would say its mustard algae by the brownish color. I tested the water and the results are.
Chlorine - 0
Free Chlorine - 0
PH - 7.6
CYA - 40
TDS - 400
Alkalinity - 60
I was told the TDS was off and the from nitrides in the water so I drained a foot of water and it is filling back up as we speak.
I have an automatic vacuum that works well and use everyday or every other day. I have been using 3 inch chlorine tablets. Power plus shock, pool perfect plus phos free and I tried the leslie's unltra clear which does clear up the water pretty good but it keeps going back to a cloudy green. I am going to buy the leslies algaecide stuff to see if that helps.
Any help is really appreciated since this is starting to cost a lot of money. PS I have sand filter and NO inline chlorinator.