I知 running the Mineral Springs now since view weeks without adding any renewal into the pool and my water is in a very good shape. I test daily and beside the PH rising and a bit high TA everything is OK. I知 in the process to find the right output setting on the unit to get my CL into good levels and I知 getting better.
A friend of mine never added renewal in he just adds salt in the spring and if the level goes down he add some more. I will see how my season goes but I don稚 think I have to add anything if my figures are correct.