hey guys, lets take it easy on the kid! we all made mistakes when we were new to the hobby! sure sounds to me like the kids heart is in the right place and he's trying. I did the same dumb stuff when i was a kid and didnt know any better. ive seen these "spots" and a bio teacher in HS looked at them under a micro for me and told me that they were Defintaly algae. He had no idea i was trying to mess with fish, and he diagnosed me as being chronically overstocked, leading to my algae "spots". I learned a lot since i asked for help, and somebody was nice enough to help me. he told me to bleach ant ornaments, and get rid of some fish. the 19:1 bleach trick works, just make **** sure you rinse the ornament well before replacing. a soak in clean water overnight works best.
that being said-
Dude, you really ought to take some of those guys back to your LFS, even if they won't give you a credit. you'll be doing the right thing.
if that wont work, i have a couple of extra tanks laying around, as im sure some of these guys do, that you could have for free if you want 'em. where are you? your folks wont likely be pissed if you get an extra tank for free. just a thought.
but you definatly need to "thin the herd" so to speak.