Hi All! Just found this site and feel that the hot tub world is beginning to make sense. I have a 390 Gallon HT with an ozonator and had been using the Nature 2 + MPS, which seemed to be working fine. However, it appears my wife is sensitive to the MPS (started getting a poison ivy type rash) which made me look into other methods and came across this site (I was already getting skeptical of the costs anyway). My question is basically: should I dump the water and start over (I just refilled less than a month ago) or can I convert it over? Here are my latest tests: FC 1ppm, TCl 1.8pp, cya 76, Ph 7.5, TA 50. I assume the MPS just gets used up so I started adding bleach since the cya was high. Have not added borax. Water seems clear and good. I am in northern CA so feel bad about dumping the water. Additionally, is it OK to leave the nature 2 cartridge in since it is only a month old or does it actually cause harm?
Thanks in advance... -eric