I have a small 5 gal. tank about 1 week old and I have recently noticed a couple small sections of a light stringy cottony looking stuff at the bottom of the tank. I was thinking it might be some kind of algae but it is a white color. I have a 1" layer of black tahitian moon sand from Carib Sea's Super Naturals collection for my substrate. I have a few plant bulbs in the bottom waiting to sprout, 1 of these bulbs has the cottony stuff on top of it, the other spot of cottony stuff is just by itself on the substrate. The tank is filled with conditioned tap water. I've used API's Stress Coat and Stress Zyme in the water along with 1 dose of Plant Gro by Nutrafin. When I first noticed it yesterday, I had 1 small angel fish and 1 violet goby (I now know this is a brackish fish, but I already have him and have no brackish tank to put him in so I can't do anything about that) in the tank. I just added a few guppies today. I tried to take a picture to help show what I'm talking about but I couldn't get any clear pictures. Does anybody know what this might be. Furthermore, does anyone have tips on how they get such clear pictures things inside their aquarium?