questions

You have 5 damselfish in a 10 or 15 gallon tank. I can't believe they aren't constantly fighting.

You definately need to do a lot of water changes to keep the ammonia down. I would get them into your bigger tank as soon as possible. You also need some live rock or at least some fake decorations so they have a hiding place.

 

Good advice from Curt. Damsels and clowns are two of the most scrappy types of fish you can have so they might just be punking each other out. Also, IME damsels can be susceptible to ich and to fin rot. I have a book called The Marine Fish Health and Feeding Handbook, by Goemans and Ichinotsubo. Maybe you could try getting this one or another similar text to augment the info you get here at 3reef. I love books so I always advocate that route. I keep my aquarium library right next to my computer, on my desk.