Recently converted BBB pool is clear, but requires 2ppm every day. Still have algae?
I moved to bleach recently but will not get a good test kit until late this summer. Previous years, I used to maintain 3-6ppm (targetting 4) with pucks in a chlorinator and OTO, fighting algea oubreaks (green all over) 4-5 times a season, usually after a short dip at or below 2 ppm when my chlorionator was empty and the solar cover was on for 3 days of no swimming. I usually recovered using Cal-Hypo powder, lots of brusing and vaccuuming. This year, after discovering this site and reading a lot, I realize that I probably had too much CYA or more precisely, never enough FC to compeletely kill algae and was always on the verge of an outbreak.
It's been a week since using only bleach and strips for measuring FC, PH, and TA (I also have CYA on one set of srtips)
My water has been really clear for 3 days, and I vaccumed the last few deposits of what seemed to be dead algae/dust on the walls and bottom, from the last outbreak 10 days ago. I was still at shock level (10ppm) 4 days ago, and overnight FC drops are at 2ppm (raise to 5 at night, measure 3 in the morning)
Here are my numbers and then the questions:
PH 7.7 (overdid correction after last heavy rain brought it to 6.8)
CYA 50 (pool store said 60, strips says 40)
Borate 5 (from qty added, not tested yet)
Is a nightly drop of 2ppm a sign that I am still battling something in my pool?
Do we really aim for 0ppm drop during the night? if not what value is acceptable?
Should I shock again?
At CYA 50, suggested Fc is at 4-8 ppm. Mid-point is 6 and seems high to me (wife looking over shoulder will notice the high value). Comments?