I am renting a house close to Sacramento CA that comes with an outdoor pool – this will be my first attempt at maintaining one. It is a 10,000 gallon, in-ground, masonry pool, with cartridge filter, small water fall (currently hardly-ever used), and no other additional equipment. I cleaned the four cartridge filters last weekend (tons of stuff came off) and the filter pump is currently set to run 4 hours per day. The pool water generally looks clear, but has a lot of tiny particulate matter floating around. The surface area of the pool walls/floor look dark grey with white spots – the walls/floor receiving less sunlight are darker (could be stains or the top-coat of plaster rubbed off). The same walls (that receive less sunlight) are starting to grow algae light “green” in color. I scrub the walls once a week with a Stainless Steel brush. Sanitation is accomplished through one of those floating gadgets, dispensing 3” Trichloro tablets.
Have been lurking on the site to get better educated and decided to switch over to the BBB method. Just received the T-100 test kit and my initial readings (accomplished once last night and once this morning) are as follows:
FC = 5
CC = 0
TC = 5
TA = 170
CH = 250
CYA = 90
CSI = 0.79
Temp = 77 degrees
I plugged the numbers into the Pool Calculator and it tells me to do the following:
1) Lower the pH to 7.2
2) Add 145 oz of 6% bleach (to get to FC of 13) or (373 oz to get to FC of 23 to shock the pool)
3) Add 46 oz of 31.45% Muratic Acid
4) Add 74 oz of Calcium Chloride
My first thoughts are to lower the pH with Muratic Acid (not sure how far to lower), raise the chlorine level with bleach ASAP (maybe even shock the pool - FC of 23), then add the calcium chloride. I need to scrub the walls more often, and think I ought to increase the run time of the pump to 8 hours per day and leave the water fall on whenever the pump runs to help aerate the water.
I'm sure there is a lot more I ought to be doing - am looking for your sage advice on what I need to do and proper sequence of tasks.
Thank you VERY MUCH (in advance) for your help – you all have a terrific site here!!!!