I second Virgo, I think you need to take the Mollies out, they don't belong in a ten gallon tank. Mollies can grow up to 4 inches each, if not larger. Some types of platy can get rather large as well, so if you have a school of tetras in your 10g as well, you shouldn't have more than maybe 2-3. You really need to read up on tank cycling, no matter what you have in that tank, it will die of ammonia poisoning if you don't know what you're doing. My website below offers a cycling explanation. You can also read up on the stickies in the beginners forum.