I am happy to have found this site. I have been reading and trying to understand everything so be patient please. Moved into a new house last Aug. that has a 22000 gal pool. Just shocked weekly and used chlorine tablets and everything ended fine. Used a local pool company to close the pool in Sep/Oct. Opened the pool this year with same company and after vacuuming we discovered algea at the bottom of the pool. It is brown in color, recollects at the same locations, it is easily scrapped of or vacuumed clean but comes back in a day or so. SOOOO after $$$$$$ of dollars in over two months I found this site and I am taking control. I have bought rounds and rounds of shock/algeacide/ and even replaced the sand filter. the pool is 9 years old and I tt with the previous owner and he said he just shocked and vacuumed it weekly and had no issues.
I bought the TF-100 and my test last night are:
FC - 70
CC - 0
pH - 6.8
TA - 110
CH - did not test
CYA - off the chart -- possible 150+
75 degree water
Water is visible very clear - so clear its easy to see the algea growing at the bottom!
after reading some similiar post the first thing I did this morning was vacuum to WASTE and removed about 25% of the water, filling back up now with the hose. Going to the store today and need a list of supplies and direction to get started. Thanks for your help in advance.