woke this morning and both frogs were dead. floating upright against plasyic plants. they hadn't moved position since last night.
when I poked them to check they were dead they both floated and landed upside down.

I'm confused about what happened to them because they were both on the bottom of a relatively shallow well planted tank in the aquatic shop.
they were the only frogs left in a tank crammed with newts.

what does it sound like they died of? and are my other frogs at risk?

I know they were in a uncycled tank lasf night which is very bad. but they did look almost dead at that point anyway.