I’m new to pool ownership… we purchased a house in Southern New Jersey last September that has a 30k-gallon vinyl pool with a DE filter and Hayward pump. I had an issue with an algae outbreak when we first moved in. The prior owner apparently used tryclor pucks in two floaters and in the midst of moving in and getting set up, I didn’t realize that the floaters were empty. By the time I checked, some algae had developed so I went to the pool store and they sold me some phosphate remover (probably a waste, I know) and “shock.” Surprisingly, the algae went away rather easily, it left some grey/brown stuff (like sand) on the bottom that I suppose was dead algae or phosphates??
Anyway, that became a PIA because I didn’t know how to isolate the skimmer box I was using to vacuum, so when I tried to vacuum, the debris on the bottom just got stirred up (even though it looked like it was being picked up) and then resettled a few hours later. I finally figured out how to isolate the skimmer box and managed to remove most (if not all) of the debris before the pool store closed the pool (which they did for free).
Anyway, we’ve had a very mild winter and warm spring so I’m kind of concerned about algae forming before I open. I pulled the cover back and from what I could see, the water was clear and looked pretty good. I took a sample from one of the skimmer boxes and tested it. Here are my results:
About my results, I have the Taylor K-2006 kit… There are two ways to test for chlorine, where one drop = either 0.2 ppm or 0.5 ppm. I used the latter and thus, my results are only accurate to 0.5 ppm. I suppose I should have retested, but I didn’t.
Regarding the PH, 6.8 is as low as the K-2006 kit goes, but the sample looked more orange than the lowest reading on the scale, so I’m assuming that means it is lower than 6.8.
TA is really low, which I think may be affecting my PH results.
I have no idea how my CYA is so low. I know the Taylor kit is only accurate at +20 ppm for CYA, so maybe it’s higher than 0, not sure, but as I said, the prior owner used the chlorine pucks and I used the pucks from September of last year until the pool was closed in October. Also, whatever the pool store sold me as “shock” probably had CYA in it as well, so I have no idea how my CYA could be so low.
Anyway, please comment on my numbers and give me whatever advice you think would be helpful. I had posted another thread about using my floaters under the cover until I open, but the consensus seemed to be that that would be bad for my liner, without some circulation. Also, the temps are supposed to go back down over the next couple of days and we’re even supposed to get down to below or near freezing temps tomorrow night. Will that kill any algae that has began to develop (assuming it has begun developing)?