found out what was my problem. I have a 600 gal
. water tank for my house, we get alot of huricains over here in Puerto Rico, and the moter had rust and red dirt in the part that pushes the water to my DI
water filter. The rust and dirt in my home filter lower my ph
so I used alot and I mean alot of buffer to rise my ph
which hardly went up This caused my cal. to go down and stay down due to that large amount of buffer. I already put a stainless steal moter to my tankand a new filter in my multi-pure system. Did a 50 percent water change and back to normal. Thanks alot you guys here in this forum, it is so nice to know that when you have a problem you have so much support and someone their for you. Again I thank you all.