So per your advice, I purchased the taylor water test kit and yesterday did my first test ever. I entered the numbers into the pool calculator, but so many things are so out of wack, I'm not sure where to start first.
The pool is 34,000 gallons.
The FC is .5
The TC is 1
The PH is 7.2
The acid demand is zero
It only took one drop of the base demand to bring the PH to 7.6
The alkalinity took 4 drops which I guess means that it is at 40
The calcium hardness is hugely high....420
The Cyarnueric acid test never looked cloudy at all, so I'm guessing it is at -30.
Where should I start. I have been shocking with like 10 pounds of shock every 4 days or so....going broke. Black algae is starting to grow quickly around the sides and there is mustard yellow algae that is powdery on the sides and the bottom. The water actually looks pretty clear. We are in Houston where it is already crazy hot and the temperature of the pool is probably about 74 degrees. Where should I start.
Thanks so much for all of your help. Soooooo tired of being scammed at the pool supply store!