Found this publication that shows a bunch of common bugs that live in ponds.
Pond insects PDF Looks like the FA had lots of Nymphs in it, Did not look closely enough but maybe Damselfly and or Stonefly. In the FA they were very tiny ones. I found larger ones in an old dead weed covered with FA. I have seen the larger Nymphs on the underside of rocks previously while looking at snails. Bunch of other tiny worm like things that were to small to identify without magnification.
I just saw the FA surface literally moving with activity when it was drug up on the pond bank. Thought it was interesting how much life it held.
