Here's my story. About 2 weeks ago my boyfriend bought me a 20 gallon hex tank with the stand. We talked to the people at the pet store where we bought it because although I have had fish in the past I never really had any luck. He was telling us about the ph levels. We told him that we were on well water. He said that he is also and that his ph is around 7.4-7.6. He said he can't get it any lower, but the fish don't seem to mind it. So, we were under the impression that the ph was all we had to worry about. He told us to set up the tank and wait 3 days before you add fish. On the 3 day after setting up the take I took the ph test kit out and tested the water. the ph was 7.2 which I thought was good because of what the guy had told us about his ph levels. So, we go off to the store to buy our fish. We get a pair of fancy tail guppies. We brought them home, and set the bag in the tank for 15 minutes then added some of our water to the bag and waited another 15 minutes. We wanted to make sure that the guppies were going to do well before we spent a lot of money on fish. We waited about 4 day and the guppies seemed to be doing fine. So we went out and bought 3 more pairs of guppies. The guy that sold us the tank was the one that sold us the first pair of guppies and then the other 3 pairs. We know him well, because we do all our pet shopping there. Anyway, a couple of days later one of the guppies doesn't seem to be doing to well, so I tested the ph again and it still seemed ok. I got online and started looking for answers as to why the fish might be sick. That's when I discovered that you have to know more than just the ph level of the water. Then the next morning when I turned the light on there was 2 more sick guppies. I was feeling really bad, but the guy at the pet store should have told us about the ammonia, and the nitrites and nitrates and cycling the tank. I'm down to 3 male guppies which I put in a 2 gallon tank and I bought some biozyme to put in both the tanks that I have. I also bought a couple of goldfish to put in my big tank to help cycle it. It really bothers me that we spent $300 for the kit, ( tank, stand, filter, heater, airstone plastic plants, gravel,water conditioner and the ph test kit) which I was under the impression, that I had everything I needed to start my tank and keep it health. I really wish that the guy at the pet store had told us all that we needed to know. And he should have told us that we needed to test more than just the ph level. I think that a kit for testing all elements of the water should have been included in the kit. Well, that's my store.