How fast does chlorine degrade in 100 degree temps? I ask because I typically fill my 15g tank with 10g of 8.25%. I added 4g of "Awesome Bleach" from Dollar Store a while ago, and pretty sure things got diltued to about 5 or 6%. But at 100 degrees with tank in sun, I'm wondering if the tank has like 3% in it now.... I keep having to run my timer longer and longer to keep FC above 3. Just curious if I should stick with less than 5g in the tank at anytime. I normally use 32oz/day, up to 48oz now and probbaly need to add more.