The numbers are as follows: FC=3.0 TAC = 3.0, Salt= 4500, CH = 350, CYA=50, TA= 120,PH = 7.4, PHO =1500. Those numbers were obtained today from a pool store test and were very close to readings I obtained using the Taylor drop test kit excepting those for salt and PHO which I was unable to test myself but the TA reading they had was 20 higher than mine. I assume all that white stuff between the cells is calcium? Anyway, it completely bridges the cell plates - always has. It should be cleaned twice a day and sometimes is. I just thought that was one of the downsides of SWG. 30 years before that I had a pool in which I used tabs but I don't remember spending so much time in maintaining it as this one which I have had for six years. Of course time dims the memory. The other noticeable difference in this one is the amount of scaling on the perimeter tiles as they are virtually light gray and pumice stone rubbing has no effect. The other difference is the constant need to add acid. After this I do not want another SWG even so called self cleaning. I'm not saying my scaling is the result of the SWG as my water has always been crystal clear, I'm just wanting to save some time in the mornings.