Brown pool

[aylad]

The polyquat creates a chlorine demand of its own, so I'm not surprised that your chlorine now is zero--but you can't let it stay there long I suspect that your chlorine is also working pretty hard on the stuff that's in your water, so it's probably going to take some diligence to get chlorine to hold for awhile. You can keep the trichlor in the floater, which will help feed chlorine in pretty constantly--just keep an eye on your pH. Otherwise, the dichlor would probably be okay, but honestly I would go with plain, unscented bleach. With all the other things you have going on in the water, bleach is the least likely to complicate things worse than they already are. Besides, it's much easier to calculate doses. What is the volume of your pool?

[Riverpixy]

I think I found out what I did wrong when I sent my original reply to your very first response to me. I think I hit the reply to thread button again to send my reply instead of hitting the post quick reply button! I just did it again.

My pool is around 18,000 gallons. So how do I calculate how much bleach to use? How often do I add?

I just ordered my Taylor K-2006 kit. Pool Supply World had it for $45 with $8 shipping.

Thanks,
Diane

[aylad]

Here's a link to the bleach calculator that we like to use http://www.poolforum.com/pf2/showthr...18-bleach-calc

You need to add your bleach as often as necessary to keep your chlorine in the appropriate range as determined by your CYA level (see the "best guess chart" linked in my sig above). We recommend that you test your water every day and add whatever amount of bleach needed to come back up to your target level. I would recommend that you do this in the evening to reduce the amount of chlorine that you lose to the sun.