Our in ground, vinyl lined pool is 20 X 40. (Volume 28,323gal.) The filter is sand. We use bromine rather than chlorine. Winter cover has been removed for about two weeks. Filter is running 24/7. Well water used to fill the pool I.e. bring thee water level up to skimmer level. Pool has been shocked on two occasions. It is very green, I believe because of oak pollen. Took water samples in to pool dealer two days running. Test results for day one: Total bromine--.1
pH level-8, Total Alkalinity-31, Calcium hardness--135ppm, (copper, Iron,Manganese,Nitrates,Phosphates,saturation index--all 0) Total dissolved solids 222.
Recommendatons: Add 21lbs of Alkalinity plus, added 19lbs
Vacuumed pool and backflushed twice
Took second sample to pool shop.
Results: Total Bromine--.22, ph level--8.2, Total Alkalinity--62, Calcium Hardness--138. Only other change was saturation index .4
Added 7.75 # Alkalinity plus, three bands shock
Day three---Added 4oz clarifier vacuumed twice, backflushed, now more od green/sage green