Re: CYA to high
Hi Boats,
there is some evidence, however I believe it's very well understood under which conditions CYA does break down or how quickly. Maybe someone else will chime in on that.
The only other way to lower it obvously is through dilution. Other than draining, dilution can happen over time due to rain, overflow, top off.
Now having said that, 80 is above the recommended level, however its not wayyyyy above recommendations.
Your pool can be managed easily enough simply by keeping your FC level relative to 80 CYA.
http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock
The thing about going this route though, is that if you get lax on keeping your FC up, and you get an algae bloom, it will be much more difficult to rid yourself of the bloom with CYA of 80
Certainly, you cannot add any more tablets until the CYA is lower, so liquid chlorine is in your future.
If you can use only liquid chlorine for a 'good while', then eventually, your CYA will drop due to dilution from rain, albeit very slowly.
If you dont have one, I highly recommend getting your own very accurate test kit to you can measure your chlorine daily, or at least every other day and add chlorine as needed. The TF-100 is the kit I would recommend.
www.tftestkits.net
hope this helps,