I have an inground 18 by 36 vinyl pool with 4 foot roman ends on each end. so technically 18x44 3 1/2 feet in the shallow end to 8 feet in the deep end. The pool company that installed said it holds 31000 gallons of water. I have an auto pilot SWG and a mod media cartridge filter. No heater. I used a 6 way test kit from wlamart, its all I can afford at the moment since both my wife and I lost our Jobs 2 years ago. I know its not the best but I hope the test results are accurate with it. Here are my numbers with the test kit.
SALT 2800(although hard to read the test strip wasnt completely white from 5.2 to 6.0 scale so could be anywhere from 2600 to 3300)
Just for fun, i had my water tested at 4 different pool stores with varying readings. they all stated i needed to raise ta and ch. and also got a range of salt from 2500 to 3000 ch tested between 86 to 201 and ta was 51 to 68 and cya 43-110 ph was from 7.4 to 7.8. My test kit is from last season. oh and they all tested for phosphates with each store different saying 100ppm. 300ppm,500ppm and 1000ppm. they said to add phosphree one company said to add backup. DO I go by my readings? How are my numbers? should i add anything? My SWG company, auto pilot recommends these levels. ta 80-120 ch 200-400 and cya 60-80 salt 3000-3500.