Hey guys,

So I purchased two ADFs two days ago, and I also purchased a 5.5 gallon tank with a filter. I have placed the two frogs in the tank with my betta, and the temperature of the water for the last two days has been 80-82 degrees, and I use a dechlorinating conditioner . One of the frogs was lighter and bigger than the other, and initially the lighter one was very active, while the darker one hid a lot. Also, I couldn't get them to eat the frog pellets I bought, up until the death. So, earlier today after work, I did a 50% water change (my tank is not cycled, but I plan to get a water kit tomorrow), and immediately after the water change, the lighter frog was lying upside down on the bottom of the tank, breathing frantically. About 15 minutes later, it was dead. In retrospect, I did notice that he hid way more than usual in the beginning of the day.
However, the other frog is still acting normal and I think I even saw him eating! He was moving his mouth and kind of clawing at his mouth at the same time. Im not sure if this is normal behavior? I am wondering if the frog could have been sick from the beginning, since it has a lighter color? I really want to get another one, but I really dont want to have another death. Any idea on what I should do to prevent this from happening again? Thanks!