Split from http://www.troublefreepool.com/threa...-would-this-be
Please start your own thread rather than hijack another member's thread Butterfly
I have no pool problems, except (if you can call it a problem) I also seem to consume CYA at a higher rate than expected. I use granular stabilizer. Water level is kept within an inch of the middle tile line, I don't have too much rain (yeah, right!), don't overfill, all that. I consider myself an experienced pool owner with almost 20 years of great water. My pool is 95% used by just my wife and myself, so not much splash out either.
I have always been very suspicious about why CYA gets consumed. I have read the articles here about ammonia conversion, but never saw any indications that ammonia was an issue, water is about as good as it gets. I can't even tolerate other people's' pools I am so spoiled. Yet I will typically use more than 30 lbs of CYA per year. The pool does not get officially closed here in Texas, I just keep the solar cover on in the winter (locked gate, no kids, and alarm), and cut the pump to 4 hrs per day, with freeze guard on. Yet CYA is typically near zero at the start of each season. I will use 4-5 lbs per month during swim season. When the pool is closed the solar cover stays on to control evaporation, so I don't bother anymore with adding unneeded stabilizer which just gets wasted away in the off months.
After reading the above, I began to wonder, is there a possible connection between air in the return and CYA consumption? I have an old-style Uniclor brine chlorine generator, which uses a venturi for sucking in the CL gas from the generator. This also sucks in quite a bit of normal air, due to the nature of how the venturi works. Lots of bubbles at the returns. Anyway, sorry for the long post, I was just kicking this idea around, and looking for feedback.
Below are my numbers from the last test a few days ago, using the K-2006 test kit. I do a thorough test every few weeks, but test for CL and pH daily. All other numbers stay very stable, except the always dropping stabilizer (pun intended!).
I think the chemistry of stabilizer, and its consumption, is more complex than we might realize. It seems to be a common complaint on this forum.
CC: no reading, less than 0.5