RTR....you are only a day or so away from THE MASS EXODUS!
VERY soon they will use those new found back legs to crawl up on the edge (ususlly starting an hour or so before dusk).
As they begin to dry---their tail will fall off and they are free to be dry amphibians.
Some (10-20) will still hang around your garden for a few days, but after that--they are gone. The only ones that will stay behind are the ones that don't complete the leg growing phase and die off.
After that, I'd drain the pool....clean it out, and then refill with new water and start over.
The brackish gunk you see now is a natural way to keep them out of sight of predators until they grow legs and can leave.
We had 3 batches (annual) of tree frogs to that at out place in the dog's swimming pool. You may not have know it but the mom/dad checked out your place for some time before laying eggs.
Good Luck!
After about a year, tree frogs are cool aquarium amphibians. They will come down and hang out in the water dish at night and hang out on the walls during the day. They are nocturnal.
ROX
