Been a long time waiting but we finally took possession of our new house, of course my first goal was to try out my new TF-100 test kit and check all the levels...but first I did a search around the house for the chemicals that were being used. I found a note left by the previous owner saying where the pool chemicals were located but nothing was there so I called the realtor who called back and told me that a friend of the previous owner had been taking care of the pool for years and was there the day before to make sure everything was OK. Guess he helped himself to the chemicals as payment.
Well first off the pool was filthy so we spent some time getting the Kreepy Krawler connected/tested and running and firing up the gas heater which was a non event, then I had time to test the water while the wife manually vacuumed the crud off the bottom.
Here are my test results;
CYA= 140-150 estimated
Needless to say it was pretty obvious there were pucks being used somewhere and I started searching for them, I found two in the filter basket that were pretty new looking. Kind of disappointed that "Mrs Kind Neighbor" had completely screwed up the CYA levels and was obviously only testing PH and maybe FC.
So after some dimensions were taken (its kidney shaped) I have estimated a total volume of 8500 USG of water in the pool and figure I need to drain off 7100 USG of water to bring the CYA down to 25ppm.
Now its been awhile since I had to do this kind of testing and I read the instructions to the letter so I am positive I did it right but these CYA readings are so far off the scale that I actually held the graduated cylinder up to the bright sunlight to see if the black dot was visible, after only maybe 7 drops it was completely obscured...I had plenty of reacted solution to try it again in case I read it wrong but there was no mistake. There is a good chance the CYA is actually higher since I may have been fooling myself by trying to get that level higher in the cylinder, the solution was the color and milkiness of a glass of Alka-Seltzer at full boil.
Since the CYA was so high I didn't even bother to do the alkalinity or calcium hardness tests but I wonder that since the FC was maxed is there a possibility the pool had been shocked and that is screwing up my CYA readings? There was no mention in the test manual on CH readings causing incorrect CYA readings. I plan to do the test again in the evening once I am off work to check my tests once it had some time to burn off the CH and the heater brings the temps up.
Please tell me I did something wrong and I don't need to do a nearly complete drain and refill of the pool, luckily water rates here are low and it should only cost me $100CDN to accomplish the refill including sewer rates. It beats the heck out of me how someone could let the CYA get so out of hand but I guess if all you do is keep dropping pucks in two at a time into that strainer it could go bad fast especially if you don't do the proper testing.
Last question is, nobody should be swimming right?