Hi! Just bought our home in July (we live in San Antonio) and it came with a 30 year old pool (12,000 gal/plaster?) and a 5-10 year old HAYWARD sand filter pump model S244S w/ variflo valve. When we first moved in pool was greenish, cleared it up (using liquid chlorine) and was happy. Then after a month we noticed the pool started to look funky and green. We think it is mustard algae but it could be pollen. We live on a heavily wooded lot (oak trees) with LOTS of shade. I have been stalking your website for a week and anxiously awaiting the arrival of the CF-100 test kit. We did figure out that the chlorine tabs were making our CYA go through the roof but I think we have brought it down (did a partial drain and refill). I started a SLAM to hopefully clear it up. (I followed the CYA/chlorine chart to determine I need a 34.9 to have shock level for mustard algae.) That was last night. Today pool is light green/teal but cloudy. As soon my kit arrived today I did all the tests and here are my levels.
CYA- 50 (was unsure...it really is subjective) Dot was blurred out 70 and disappeared at 50)
PH- 7.6 (I had lowered it to 7.4 to SLAM last night)
CH- 1,000 (surely this can not be accurate but I did do the test 3x and got the same results)
I am looking for help/advice on what to do next. I put in the new goal levels based on these test results and was going to SLAM again tonight to "keep on keeping on" until the pool is clear and I have passed the 3 criteria to cease slamming.
First time pool owner too...so was basically "scared of my pool" for the first month lol!
This is also my first post so please forgive if I posted in wrong forum, did not add signature correctly.