I am trying to figure this whole "PH" level thing out. I have had my tank for three or four months now with no real problems. I set the tank up for two weeks before I added any fish. I also tested the level myself and had the pet store people test them and all were fine. I added fish gradually over several weeks and had no losses. Recently, after returning from vacation, I lost 5 fish (1-glow fish, 1-molly, 1-platti, & 2-guppies) in three days. The only difference was that I used one of those "automatic" feeders for the week I was gone. I tested the levels again and received readings of pH=6.2 acidic/ total alkalinity=0 / total hardness=very soft (0-25) / nitrate and nitrite=0. I am using a "5 in 1" test strips from Jungle Labs. The rest of the fish in the tank appear fine. There are 2 tetras, 2 glow fish, 2 guppies, an emerald cory, a pepper cory, and a platti. I was told not to add any more fish until I could get the pH level between 6.8 and 7.2. The water from my well is very chlorinated, so I use bottled water. How can I raise my pH level and keep it where it needs to be?