Hi Fishlore, I have a few problems on hand at the moment and not sure what to do. Im trying to use this RO/DI water for all 3 of my tanks. My goldfish, my angelfish and my livebearers/Neons. I added all the needed additives according to the directions. I added 1 tsp of Alkaline Buffer because my pH was so low 6.5 after DI, 6 caps of replenish to get my GH to 6 and 1 cap of Fresh Trace. Anyways, right now my parameters of the RO/DI water is pH-7.8 gH-6 and kH-2.5. I have more than 20 gallons of water in my brute container so I have no idea why it sent my pH skyrocketing! Please help! I have no idea what to do and have to do water changes tonight because I am leaving for vacation tomorrow! Thank You!