I've been taking care of my inground 24,000 k pool for three and a half years now. I've been doing a good job of keeping the chemicals balance and whenever I take my water in to be tested they always tell me it's perfect. However over the past couple of weeks I've had a covering of particles that sit on top of the water it's not so that you can't see through it they just float by and I've never figured out what they were but at night they look white however during the day you can't tell if there's a color to them or not. This morning I stuff my hand in the skimmer to come up with some of these particles to get a better look at them and they're moving so they are some kind of bug but you can barely discern the fact that they are live except for the little bit of movement that they have they're so tiny you cannot identify they're just like a little blackish brown spot that move around so I'm trying to determine what I need to do to get rid of these things. 
