Here is my story (I'll keep it short)
Went to the local pet store and picked up a small tank, gravel, water treatment, food, heater and food. When I got home (too late), I realized I did everything wrong. I went back and purchased a 5 gallon tank. I treated the water (tap water)and did the whole water temp acclimation (set heater and water was 76-78) with the fish. The fish lasted about 6 hours before he died.
The next day I went to another store and spoke to a few employees and told them my story. They said "you are doing everything right" so we chalked that one up as a sick fish. I bought a few more things (decorations and fake plants), I exchanged the heater for a better one and another fish. He looked very healthy at home but that only lasted a few hours. Soon he was very lethargic and staying on top. When I got home today, he was dead and so where 4 apple snails I bought yesterday.
I tested the water with some of those strips and everything looks fine (are they not accurate?).
Water was at 78 degrees... Not sure what to do!
I refuse to buy another fish until this is figured out and my daughters are heartbroken. Please help.
Here are some pictures: