My water started looking a bit cloudy yesterday, but I just did a 20% WC three days ago. I noticed some algae on the front glass and started to go at it with my magnet scraper. When I got going I noticed these little white specs on the glass that are moving around. I tried to take a pic, its very difficult to get them in focus though. Not sure what they are. Any Ideas? if they are a pest, how can I get rid of them?