within 2weeks of opening the new pool I had anywhere from 5-10 of these critters in my pool. At first I figured it was just normal. After dichloring my pool and getting my cya up, they disappeared and only had maybe 2-3 a week. Now it is back up to at least 5 every day. if they touch you in the pool or you scoop them up to throw them out, they sting you! not like a wasp or bee sting, but about a 2-3second attention getter!
They swim very quickly if you are attempting to get them with the net. I have seen them on the water surface, but they are usually about 24in below the surface most of the time.
This guy has been in 3% hydrogen Peroxide in attempt to kill him to get better picks.
He has been the solution for 16mins now and is still casually swimming.
If you take them out of liquid, the flip flop like fish out of water.