I've never had any ADFs before this and I have had bad luck putting new ADFs in my 10 gallon cycled and planted tank that always tests perfect. I do 25% water changes once a week. I got two last weekend. They both died the day I got them got replacement frogs and one survived, the other died. Had a difficult time feeding the surviving one. He jumped to the blood worms but wouldn't open his mouth (I found him dead this evening ). I noticed all the dead frogs had a dark spot on their underbelly. I wasn't going to get any more because I was scared that it was something I was doing wrong but when I went back to the store they said they lost 3 that day and have lost quite a few since recieving the shipment so it's most likely the frogs they got in. So I got another one which is still doing okay but he hasn't been very active today. He will eat though. I noticed when I got him he was significantly fatter than the other one that wouldn't eat. I thought he was just fat or the other was just skinny because he wasn't eating but now I'm wondering if he's bloated. Does he look okay? What can I do to increase his possibility of survival?? So tired of losing these poor little guys.