Hello my pool is an Intex 18x48 Above Ground Pool. This is my first pool ever and only ever done BBB. I've read pool school and kept a very pretty pool. Until now.
The water was crystal clear and pretty until the beginning of July. It just started getting cloudy now and then.
I first noticed I needed more and more bleach on a daily basis so I checked my CYA level and it had dropped from 40 to 30. I added more stabilizer and continued checking my FC level and adjusting each night to 6 (Pool Calc says my goal should be 3 to 7 and the CYA chart says 5). I shocked the pool on the 2nd for the first time and the water went back to clear the next day.
I test morning and night, clean the pool daily, brush weekly (unless needed), vacuum weekly, clean filter cartridge weekly, change filter monthly.
The water was a little cloudy this morning with a little staining on the bottom. Tonight it has a green tinge to it, cloudy and the bottom is staining brown (like tea stains) around the edge but my numbers are kept in the proper range. Tested first thing this am and was still testing above 5.
Tonight's numbers are as follows: (HTH 6 Kit)
FC = 2 added 40 oz of 8.25 bleach (we've had high 90s to 100s temp here)
PH = 7.2
TA = 150
CH = 250
CYA = 30 (lower again after adding 12 oz liquid stabilizer yesterday for a 35 level)
Could the high heat be affecting my CYA & bleach levels? Also my vacuum uses the water hose. I think that might be added to the loss of cya.
I usually buy my bleach at ALDI. This last batch is dated 5/27/2013 which seems old to me.
I am thinking I need to shock the pool again. I only have a basic HTH 6 test kit for chlorine so how do I know how much bleach to add the next night if it only tests to 5?