I started a new tank on Saturday. I am doing a fish in cycle using Marineland Biospira. My PH level yesterday was 7.2. After adding driftwood today my ph dropped to 6.0. What can I do to naturally increase my PH? Could this be due to cycling and not the driftwood at all? I soaked the driftwood for 30 hours before adding it to the tank. My ammonia level is at 0 yesterday was at .25 and my nitrates and nitrites are at 0 as well. Should I do a 25% water change the water out of my tap is at a 7.6 PH.