Hi, I have been noticing a high bromine demand. My tabs in my brominator disappear in a couple days. Often if I shock to 10 ppm, a day or two after my bromine is at 0 ppm.
So yesterday I was trying to fix this issue, and used dichlor until my tub got up to 20 ppm, which was a bit high but it went up quick (e.g. after 6 tbs it was 2ppm, and after a few more it went up quick).
So I let 20 ppm swirl around for a bit, but I thought I shocked it too high, so I drained half my tub and refilled it. 24 hours later I checked it, and its at zero ppm again.
Im not sure if the tabs I am using are crap, or if something is growing in my tub that is demanding all this bromine. My issue is that I am in canada, and it is really cold here and I do not think its safe to fully drain my tub.
Is there anything I can do with a half drain, or not really? Is it safe to fully drain and refill your tub in -20 C weather?
MY Alk and PH are normal. I am using a taylor kit and generally know what I am doing (although much of my bromine tests are with the strips). Usually I find the bromine easier to stay at 3-4 ppm, but lately its been bottoming out to zero every couple days.