Hello You awesome Pool School Guys! You have helped me so much already just trying to get my pool to function (I THINK I figured out the spa leak, the drain backup issue, and a few other issues still in progress). Now I am finally ready to get the water in shape so we can actually swim and enjoy the pool! By reading here, I think I have a good test kit, but it was left by previous home owner so I have no idea how old the kit is. I took my water to local store and had them test and then have been trying to use my kit and see if I can get the same results, but no luck! Not sure if its the kit, or if its the fact that my CYA levels are so high that I need larger amounts of FC per your chart... IF I am reading the chart correctly?? So here is what I got if you can please let me know if I am doing this right! FYI: Unfortunately, I used a bunch of products before I found your website to get the pool chemicals to where they are now. I can't undo that, but I have definitely learned my lesson and won't take any advice from anyone buy you guys here from now on! At the beginning of June I added 15 gallons of chlorine (still only got a .2 FC reading), 1 quart of phosphate remover (my phosphate level was 2000+), 2 quarts of algeacide (my pool was a thick green, murky, mosquito pond when we moved in).
Per my local pool store my readings are:
Local Pool Store Chart
My Results Min Max
Total Chlorine 2.8 1.0 3.0
Free Chlorine 2.8 1.0 3.0
pH . 7.8 7.2 7.6
Totol Alkalinity 130 100 120
Calcium Hardness 400 200 400
Stabilizer (CYA) 105 30 100
If I try to use my Taylor Deluxe DPD Test Kit
I can barely get a pink color. Looks like there is less than the .5 based on the color indicator.
If I am reading the Pool School CYA chart correctly... CYA level of 30 means 2-4 FC range is optimal. Since my CYA level is 105 my FC range should be 7-12 so I need to slam and add a lot more chlorine, right??
So I am trying to figure out of my test kit should be replaced. If I should be between 7-12 because of the high CYA levels, then maybe my kit is correct and I will get the right color reading after I slam to bring the FC level up to match the CYA???
1 more question. Taylor Chart and Pool school say based on CYA level of 30 that FC range should be between 2-4, but my local stores all say 1-3. Is this different just based on our region? You guys are nationwide so you have to appeal to a larger demographic, should I use my local store recommendations because they know my climate? Or ignore them and stick with your chart? You have been right about everything else! So I am good with following your advice and chart!!