I have to assume you don't really want to know. PM me if you do and I can explain.

Scott

Problem solved. I cut up some plastic baskets and made little mesh ramps for them to climb out of the pool. I haven't found anymore dead frogs yet but if I still do after this and the Critter Skimmer, there's probably no saving them.

I hope that works. It is sad to any of god's little creatures die unnecessarily and due to our actions so I share your concern. It may be that you will only find them in there right after rains depending on what you climate is like and what species you have around.

I would not call them stupid, nor are they smart in any way like us. Millennia of evolution have equipped them to reproduce quite well in ponds, lakes, streams and ephemeral pools quite well. Swimming pools, sadly, they are not equipped for. If they could think, they would think they have found a nice rain-filled hollow and jump right in. In fact, they have a much more base response.

They all seem to be Wood Frogs. One was quite large, I happened to see it and a much smaller one that day and scooped them out. They were "smart" enough to not jump back in.

I read that they vomit up their own stomachs so perhaps that is what the bubble is. But maybe it is also their egg that is clear because it is unfertilized, because the only time I saw this there were two frogs I rescued alive from my skimmer. The best time to rescue them is first thing in the morning at 6:30am or 7:30am. Any later than that and they may have struggled too long to get out and passed away of exhaustion. Frog logs do work but you do have to help them off them so check them after the skimmer. I wish I bought a lighter coloured one because the medium blue doesn't allow me to see the dark green frogs on them until I am on the other side of the pool up close. Worth having though as I did save a couple within a few weeks! I think maybe some can jump off but some can't. Maybe I am wrong and they were just relaxing and I ruined it lol!