CYA is cheaper than chlorine, and in most cases CL is cheaper than water. However the latter doesn't apply when CYA is so stratospherically high that shocking exceeds the cost of a drain and fill, not to mention the unfathomably large amounts of bleach you'll need to dump in daily to maintain a proper FC to CYA ratio.
It's just not financially smart or feasible over the long haul. Think 50 gal. drums and a tankerd. The cost will exceed a drain and fill by untold numbers.
You have a few choices. Let the pool go totally to the dogs, green swamp and all, crossing your fingers, hoping your pool gets infected with the elusive CYA eating bacteria. Or it develops so much ammonia from decomposing vegetable matter that it destroys the CYA.
Hire a company to perform a reverse osmosis treatment on the water, thereby removing the CYA.
#1 is very risky and dangerous to the pool, there more than likely will not be a cost savings overall vs. a water change. Clearing a swamp is eeeeeeexxxxxpeeeennnnssiiivvvveee!! And time consuming, read 3+ weeks or longer.
#2 Would be pretty awesome if it were cost effective, but it's not. Unless you know someone with the equipment. Read salt water aquarium hobbyist and expert.
I'm a bit of a hippie myself and I'm the 1st one to look for the most environmentally friendly option, and wasting water..... that much??!! It saddens me!
But sometimes the more environmentally smart thing to do is that which seems most wasteful. As the simplest thing is often the best and the most complex is often the worst. When it comes to being environmentally friendly that holds true at least. As in this case, with the cost factors, electrical consumption, chemical impact, etc.... Draining and filling, at least a partial, looks mighty smart!! Both fiscally and environmentally.
Hopefully that makes sense. I'm a realist, but at the same time a think outside the box, the glass is both half empty and half full at the same time, kind of guy.
Ps. I'm not a real hippie.... but I think along those lines a lot. It's complicated.
Hopefully this helps you in your decision and to see things through a different lens.
Happy pool time!
Ps. We are here to support and help you in whatever you decide to do. So long as It's informed and you know what's going on in your pool and why. As that's what really matters here @ TFP.
