Questions from a Newbie

[Ian]

Further update....Clown fish still not caught..I'm out of ideas any attempt sends it into hiding.
As for the tank itself
salinity is up to 1.025
all other tests remain consistant with nitrates and nitrites now both down to zero s0at least that is going well. Using distilled water straight from the lab has worked wonders here

I did find a Coral-eating nudibranch in my tank. Identified it here
http://www.peteducation.com/article....articleid=3354

since I found the first one I have removed 4-5 much smaller ones from the tank
any ideas on how to rid myself of these without using chemicals? Everything in the tank seems very healthy and I don't want to mess this up.