Thanks for your reply.
I'm on the west coast of Florida, sub-tropical climate, 10,000 Gal. pool.
I really dont have a pool problem, but accidently added too much CYA to the pool. I dumped some water and got the reading down to 50 PPM. I have a salt water pool, take readings frequently, and have been blessed with literally NO problems in the 5 years that we've had the pool.
My neighbors say that I,m full of BS, but weve never had an alge problem, and have only shocked the pool 3 times
in 5 years.
The only problem that we've ever had is when airborne fertilizer got into the pool and raised the NITRATE level high enough that the chlorinator would/could not produce ANY chlorine. Again we had to dump half the pool to correct the problem.
For grins I took a water sample and had it tested with a Millipore standard plate. The reading was 10 CFU(colony forming units. Many municipal water systems have far more than this.
Again, thanks for the response.
Calcutta