A couple of days ago I noticed guppy babies in my 55 gal tank, about 4 skimming the top and 3 or 4 in one area on bottom, how can I be sure, there aren't fry on the bottom when I siphon ?, I keep one half of the tank lit and that is where I have seen babies, so thought I would siphon dark end, will look first, what do you guys do ? ty carol