Baby seahorse not eating

Hey all. Okay, don't get all upset but............I'm not a saltwater guy........sorry. However, a friend at work owns something of a mini reef. I believe she has something like a 10 gallon tank with a bunch of live rock, about 3 inches of live sand, some live corals, an anemone or two, a clown fish a hawkfish (which she is desperately trying to catch and return since it killed her clam and one other fish). I guess her lighting is fine and she has a filter that apparently provides a decent current and filtration. She also has 2 seahorses. One of them, the smaller of the two, is about 3 inches in length and has stopped eating. She says that it's been kind of sluggish and won't take any food. she also had a small problem with red hair algae starting to develop.

I'm not sure what she has been feeding the horses. I think maybe some kind of baby shrimp or something like that. She has to wrangle them up in a net to isolate them from everyone else, otherwise they won't get any food.

I know I've been kind of vague but that's all the info I have right now. I actually wasn't even going to post this but I figured I'd give it a go and see what comes up. Anybody have any ideas as to what could be wrong? She really loves her seahorses and would hate to lose one. As far as I know, she's had the tank for a long time and everyone else is doing fine.

Thanks a lot!

Thanks for the reply. I quess it's a moot point now anyway. Apparently, the seahorse was dead when my friend got home yesterday. She has another larger one, as I have said before. If she sees any problems with that one I'll tell her to got to seahorse.org.

Thanks again