Before I ran into this pool forum, I had a problem w/ mustard algae. It's not the 1st time, so I treated it the same way it was treated before. SHOCK, CHLORINE TABS (INLINE), YELLOWSTUFF, BRUSH, VACUUM, BACKWASH, CLARIFIER. I test the water everyday sometimes 3 times a day for chlorine & ph levels. About 3 days after initial treatment, I tested CYA was about 100 or more. My water is still cloudy, but at least, I'm starting to see the bottom.
Well, I decided to get everything else tested, so I brought water sample straight to the pool store. Here are the numbers:
15,000 gallons, plaster, sand filter
Temp 84 degrees
Free Chlorine 2.0
Total Chlorinre 2.0
Combined Chlorine 0
Cyanuric Acid 100
I've been reading a bit here and there on the forum..decided to close the valve of the inline chlorinator since my CYA is on the higher side. I threw about a gallon of bleach into the skimmer. After reading, I want to start the BBB method. Back to the results, the pool guy said that the copper level is high, and he told me to buy 2 qts. of Ram Metal Hold. He said I need to raise my pH, and then add about 1.5 qts. of the Metal Hold. I didn't buy anything because I wanted to do more research about adding the chemical. I'm tired of all the chemicals they tell me to put in because it seems like such a waste of $$. From what I've been reading, I'm getting the impression that the lower pH precipitates (disburse/discharge) the copper which could be the cause for high levels of copper. It's so hot here in Texas right now, so I lose water through evaporation. We are also on a water conservation, so I really can't drain anything. I'm only allowed to use excess water 2 days out of the week. In a couple days, I will be able to refill (and will need to), so I'm hoping this will also help w/ CYA and copper levels. Would I be able to just add borax to raise my pH and lower my copper? About how much and how should I add it (timeframe and amounts each time)?
I'm sorry for this being so long, but I wanted to be as thorough as possible..wouldn't want to waste anyone's time w/ half of the info. Thanks in advance.