I have a question about those little swimming bugs, i think they are called back swimmers. After i had my pool up for about 2 days (in the yard, no cement), these things showed up. I called leslie's and they advised me to shock, lower ph with muriatic acid, and use black algae killer. I did this (except I used hth algae guard 3x concentrate) and every bugs in the pool was dead. I vacuumed them up yesterday, and when I went check on the pool this morning. Surprise, they are back by the hundreds. Well, I have a formula for killing them, but how can i keep them out? I use hth chlorintating tablets. Have to keep chlorine at almost shock levels to kill em. My readings this morning are:


Chlorine: around 4 to 5
PH: around 7.6 to 7.8

Pool info:
Intex 22' x 52" Ultra Frame AGP.
~10,000 gallons
Vinyl pool with metal frame.
Krystal Clear Cartridge filter pump, 2,500 gph.
Installed 6-4-14 filled with city water.

Here are some pics of the bugs that keep coming back.





Thanks for the help!