Originally Posted by ReverendLoveBoys
1. Purple Tang
2. Achilles Tang
3. Desjardini Sailfin Tang
4. Blue Green Chromis (3-5)
5. Royal Gramma
6. Green or Spotted Mandarin
7. Just about any Foxface/Rabbitfish
8. Some Goby that sifts sand
9. True or False Percula (after the Cinnamon is gone)
10. MAYBE a "reef safe" Trigger
Some good suggestions in the above threads, so I will elaborate on the fish.
The Purple Tang is one of the easiest to keep of all Tangs, but also one of the most aggressive after establishing a territory. If you want this fish, add it last.
The Achillies Tang is a very difficult to keep selection that is best left in the hands of extremely accomplished aquarists.
THe Desjardini Sailfin is also a Zebrasoma species of Tang, like the Purple Tang. You need to pick only 1 of these 2 fish.
The Chromis should fit nicely.
Royal Gramma will mix well and are sturdy fish. You will want to quarantine this fish, however, as they are very prone to ich.
The Rabbitfish would be best left for a larger aquarium, as they need a lot more swimming space than you have to offer.
Percula or Ocellaris Clownfish would be fine. A Trigger would not be a good idea for this size aquarium.
Now, I have a few words to elaborate on the concept of keeping a Mandarine Goby. Granted, the length of time an aquarium is set up does not have a direct correlation to the stability of the environment. However, the advice for having a seasoned aquarium is more appropriate with a Mandarin because of its very unique dietary requirements. Rather than wait a year, I would advice that you have a refugium, and wait until a thriving supply of copepods and amphipods are visibly apparent within your aquarium. Additionally, do not keep any other species of fish which require this special diet. A 90 gallon is pushing the limits of capability of supporting a single Mandarin.