Best non-aggressive fish to put in a new saltwater?

[FishFanaticSyd]

That's a big question....LOL

+1 on the royal gramma, just be certain you get a gramma and not a bi-color dottyback. They have very similar body shape and coloring, but the bi-color has a definite line separating the colors and on a gramma the colors blend into one another.
Bi-color dottybacks are VERY aggressive, so you don't want to make that mistake...LOL

A blennie would work as long as you keep in mind it's mature size and get one suited to your tank.
A dwarf angel could work, but as mentioned your tank may be too small and could elicit territorial aggression from the angel. But I suggest you wait on attempting one until your tank is at least 6 months along stable.
What are the actual dimensions of the tank because that could also be a determining factor. A long rectangular tank opens more possibilities than say a cube or hexagon.

Stay clear of tangs until your tank is very, very well established and stable.

May I suggest taking a peek here if you haven't already;
Beginner Fish: Tropical Fish for Beginners in Saltwater Aquariums


(I hate going to that site...........it always makes me want to set-up more tanks... )

Thanks for the site recommendation, it's awesome! I maybe will order from there... once my filter matures. I have to wait 3 weeks! That is so hard...

 

[FishFanaticSyd]

I chose: 1 royal gramma, 1 coral beauty angel so far. It is actually a 25 gallon as calculated by aqadvisor, but my dealer recommended these fish with the knowledge of my true tank size. I AM overfiltering. And overskimming.

 

[erichm20]

I love royal grammas too but can never keep them alive for some reason. I love 6 line wrasses- tons of personality. I'm not gonna sit here and tell you what fish to get, your free to get whatever you want, but liveaquaria recommends a 70 gallon min tank for coral beauties. fish dealers are in the business of selling fish so I would seek a more objective opinion. Purple and red firefish are pretty also.


Sent from my iPhone using Aquarium Advice

 

[FishFanaticSyd]

My gramma already is having parasite problems. Doing my research b4 I try to treat. My local dealer (a VERY knowledgeable place btw) said that a dwarf angel was fine in my tank. Yay! I am definitely enjoying my 2 months as a marine fishkeeper so far! (+ 6 months of research)

 

[Sniperhank]

I wouldn't take that advice. Smallest dwarf angel is smallest recommended is a 55.


Sent from my iPhone using Aquarium Advice

 

[FishFanaticSyd]

Its already in my tank, too late to return it. Seems to be doing fine to me...

 

[chefbill]

A Great Dane in a closet would seem fine for awhile too.

 

[Sniperhank]

I'd be concerned normally, but with the fact that you've been having troubles with the fish you already have is reason for more concern.

 

[FishFanaticSyd]

The angel fish is out of the tank. Am I still stocked?