We've owned out 16 x 32 AG pool for about 3 years now. After spending a ton of money at our local pool store I decided to try the BBB method. Found it a little bit of a challenge initially but I THINK I have the hang of it now. First question, let's say your numbers are all good everything looks good i.e. no algae or cloudy water- how often SHOULD the filter be run? Secondly- what are these little tiny black swimming bugs I see and do they mean I have a problem? Thanks