G
Guest
Cliff_s,
I have to agree with Richard after studying his material and from my emperical experience with my customers pools. In addition, I have seen too many pools with SWGs and low CYA and the drastic redution in cell output in EVERY case I have seen (usually from percentages in the 70-90% range) down to around 30% or even lower can't be account for by just the effect of CYA keeping the chlorine from being degraded by UV. Pool size does not seem to play a major part in this either! Some of the larger pools I have seen have not been able to hold a FC level until the CYA was increased but I attribute this to the fact that the amount of chlorine produced by a cell is finite and these pools were already at the upper end of pool size they were designed for. My own pool is very small and when I was first started up my CYA was only at 30 ppm and my generator was at 70% and was only maintaining a 3 ppm FC. Now I am running at 8% with a CYA at about 70 ppm to maintain 4 ppm FC. I do not believe that this drastic difference can be accoounted for simply by the UV inhibiting effects of CYA. In both cases pump run time has been 8 hours during sunlight. I do have 50 ppm borates in my water which does decrease sanitizer demand but even before I put them in I was running at 20% cell output once the CYA was raised.
I have to agree with Richard after studying his material and from my emperical experience with my customers pools. In addition, I have seen too many pools with SWGs and low CYA and the drastic redution in cell output in EVERY case I have seen (usually from percentages in the 70-90% range) down to around 30% or even lower can't be account for by just the effect of CYA keeping the chlorine from being degraded by UV. Pool size does not seem to play a major part in this either! Some of the larger pools I have seen have not been able to hold a FC level until the CYA was increased but I attribute this to the fact that the amount of chlorine produced by a cell is finite and these pools were already at the upper end of pool size they were designed for. My own pool is very small and when I was first started up my CYA was only at 30 ppm and my generator was at 70% and was only maintaining a 3 ppm FC. Now I am running at 8% with a CYA at about 70 ppm to maintain 4 ppm FC. I do not believe that this drastic difference can be accoounted for simply by the UV inhibiting effects of CYA. In both cases pump run time has been 8 hours during sunlight. I do have 50 ppm borates in my water which does decrease sanitizer demand but even before I put them in I was running at 20% cell output once the CYA was raised.