I am at my wits end trying to figure out what is going on with my ph. I moved from the city to a rural area with a well. There is a softner using K+Cl. I tested the water using an API freshwater kit. The ph was 7.0 out of the hose that I used to fill the 75 gal tank. I hooked everything up put in quick start and it ran a couple of days before I brought my fish out. A day later I checked my ph and it was 7.8. In the mean time I set up another 75 gallon tank with the same water but no fish just yet. It also is reading 7.8 right after adding it to the aquarium. What could be causing this sudden shift with 7.0 pH out of the hose and once it hits the aquarium it reads 7.8 . doesn't sound possible but it is. Does anyone know what would be causing this? I have 300 gal aquarium to move yet and I need to get this figured out.