Hello Heather & Mike, I live in Toronto and regularly spawn a pair of triple red A. cacatuoides in water that is about 10 GH, 3 KH, and pH 7.6. I soften/acidify water for some other dwarfs, but these guys don't seem to care. You say your pH took a jump from 7 to 7.6. Did you take that first reading right after a water change? Sometimes a tank can become more acidic immediately after a water change. I believe this is because of the dissolved CO2 in solution. The tank will become more basic as the CO2 escapes. For dwarves that I soften the water for I let it sit out overnight before I alter pH and do water changes. I put tapwater as is into the A. cacatuoides tank and they don't seem to mind. Hope this helps. Andy samaroo@aracnet.net