Little Fry- What does the water look like? Milky white is more than likey "new tank syndrome" and can be cleared up with BioStart, Toxivec, StressZyme- adding good bacteria to the water becuase you have over filtered, cleaned, or w/c'ed.
Pig Pen- Green seems like it might just be algae overgrowth. If you are near windows or leaving your lights on for hours on end, that is your prob right there. Try cutting lights off for a week/ closing blinds/ or doing a "black out" by wraping the glass with a black trash bag for a week to stop the overgrowth. Doing daily water changes and vacuuming the gravel will help clear it up too.
Just some ides without knowing too much info on either sitatuoin...