I purchased a second hand Aquatic Life RO Buddie. The Deionization filter has not yet changed all the way. So after doing 35 gallons I used the TDS meter on a new bucket of RO water. The meter goes into the red at about 98 to 101. So I tested my water out of the tap and it is at 112. What does this mean? I have the four stage RO Buddie. As I said the Deionization filter should still be good. Guy said others don't need to be changed but I don't know. Is there one that I would need to change to get that TDS reading down? Is that reading acceptable? I ask because it is not much lower than my regular tap water. Or is it? Reg tap 112, RO water 98