Can you explain that? Can you add what test kit your are using to your signature?
Have never seen that one.
You should have enough mixed solution to fill the tube plus a little. So measure how much water is needed to fill the tube. Then round up (might be 30 ml?) and mix your sample with half pool water and half reagent.
If your water temp is in the high 80s, you may lose 4-5 ppm of stabilizer a month. At least that’s my experience. I would test it at least every few weeks.
CYA loss seems to be a bit erratic. I started the year with a fresh fill, and I’ve gone through 10 lbs of stabilizer already this year.
Hello,I am making some headway.
I have been adding bleach daily to get to 5ppm. On Thursday, I added 32oz (weight) of granular stabilizer to the pool in a white tube sock hung under the pump return. My skimmer basket was too small to put it there. As of last night, it was all dissipated. I would put my pre-stabilizer CYA reading at 0-10
This morning, FC is less than 1, probably 0.5ppm. CYA is 25. The tube only fills halfway, so I assume I am just mixing another batch and keep filling the tube up?
Once stabilized at my goal of 40, how often will I have to add stabilizer? Should I be getting larger containers?
Does bleach lose effectiveness? When I added yesterday, I used a container of liquid Pool Shock containing 12.5% vs the 10% household I have been using.
Anything more I should be doing at this point?
CYA or stabilizer does not dissipate or evaporate. Its purpose is to slow down the chlorine or bleach evaporation from pool water.
I would make sure that when chemicals are added, that the amount added is proportional to the pool volume to ensure the correct concentration (ppm) is reached.
Once you reach your CYA target level (say 40 to 50 ppm), you should not need to keep adding unless you lose water like when it rains and the water overflows your pool.
Unfortunately Bleach or chlorine will evaporate daily due to many factors including ambient temperatures, wind and pool usage.
In my pool, for example, during summer time, I lose between 2 and 3 ppm of chlorine per day so I have to compensate by adding chlorine daily to my pool.
The pool has a chlorine addiction !
Based on Poolmath here, and the pool volume, you determine how much chlorine you have to add to compensate for what you lose daily.
Sooooo.... Say you add chlorine and get to 5 ppm today. Tomorrow at the same time take a sample and see by how much it went down.
If you lost 1 ppm then add the chlorine prescribed by Poolmath to increase the concentration by 1 ppm.
BTW, I only use liquid chlorine.
I hope this helps...
I believe ChemGeek's article in this forum explains the theory of this degradation. Here:just a little nitpick. CYA actually does decrease on its own but the loss is negligible. It naturally degraded by a few PPM per month
You will lose a lot less chlorine. Without stabilizer you could lose up to 90% of chlorine in a few hours.OK, so once I get it to a good level, it should be fine. I will still be adding daily chlorine, but hopefully less than I would if CYA was very low.
Well, I am left with some questions regarding this subject...I lose about 15-20% of the CYA a month during the summer months with no rain or overflow.
High water temperatures and strong UV does degrade CYA level over time.
Maybe, in the future, the pool industry will pick up on this finding and start changing how they describe CYA's characteristics and behavior.Those of us in the desert have that. S Texas does not have the UV load we have. You have humidity and clouds. We do not.
Mine is on the high side because of my location. Those in Phoenix, Tucson, and Las Vegas most likely do not have that high as they are all higher elevation and not as hot.