I would like to make a plug for the pool math calculator. It is dead on accurate! I bought 15 boxes of 20 mule team borax and a four pack of 31% Muriatic Acid from a store that has the Hasa.com that Richard320 made a plug for in one of his posts. Each box of borax was $3.38 at Wal-Mart and the MA was $16.00 plus the $6.00 deposit. My wife had a little 20 mule team borax leftover from like forever so I figured with the pool math calculator that I needed 4 and 1/3 gallons of MA and then poured the borax in and added the MA in 1/4 increments.
I waited almost an hour and a half then tested with my new borate testing strip and checked my PH with my TF-100 tester. Holy crapola folks, I was dead on 50 ppm of borates and my PH was dead on 7.5! I can't tell you how easy it was to do this with the pool math calculator! I'm so impressed with it.
Now, I have sparklypoolitis! Getting ready to string a new pool light in later on tonight after it cools off a little bit. We've had a long streak of temperatures in the middle of what we call the one oh's, 105, 106...so we're going to wait until about 5 pm to start that. My wife and I are psyched big time as the pool light has not worked in over 5 years. Wish me luck!