Copper in water - ok to use bleach?

[Watermom]

Your most immediate concern is your ph level. How could it have been 7.8 three days ago and now at 6.6? Have you added any muriatic acid? Did you pull your water sample off the top of the pool after rain before your pump had been running and circulating the water? If it is indeed 6.6, you need to add some Borax ASAP. Readings below 7.0 are acidic and can damage your pool. Also, your cya is sky high at 146. We recommend 30-50. How long have you been using dichlor? Have you used any trichlor pucks? With cya that high, you have two choices. One - you can do a partial drain and lower it. In your case, you'ld probably have to do a partial drain several times. Choice two - live with cya that high, but as a result you'll have to run much higher than normal chlorine levels. I'm sure that is why you are having algae problems because pool stores don't seem to know to tell people that if your cya is really high, your chlorine level must be also or else you get algae. Take a look at the sticky at the top of the chlorine forum called "best guess table." No more trichlor or dichlor for you. Both will cause your cya to continue to climb. Since you don't report your calcium hardness level or tell what type of pool it is, I can't recommend using cal-hypo. Bleach is your best bet for your source of chlorine.