Thanks, Misschievou2! Just saw your response since the notification went to my spam folder. Thanks for your advice on cleaning the tank. I use vinegar and baking soda for most of my household cleaning to avoid harsh chemicals. I don't really want to break down the whole tank and start again though. For one, I don't have a back up tank to move the tadpoles and tetras to, and two, I don't really want to have to start the nitrogen cycle all over again in this one. That would be some major stress for the fish and tads. I ended up running the tank decor through the dishwasher and then rinsing, rinsing, and more rinsing, and letting them dry thoroughly. So far so good. All the tetras seem fine and the tadpoles look fine, though this is my first time raising tadpoles so who really knows? I'll just have to wait and see. I've decided not to add any new fish or frogs to the tank and see what happens. I don't know why the bacteria wouldn't be affecting the tetras or the tadpoles, unless it is some sort of bacteria that requires physical contact to transfer? I have no idea. I am really hoping to get myself a cheap 5g. set up so that in the future I will be able to quarantine any fish or frogs I buy before I release them into the community tank.

Thanks again for you condolences and advice!

Steph