This is my first post here, and I'm looking for some recommendations on what is appropriate to put in the 12 gallon seagrass and mangrove aquarium I'm setting up. The dimensions are about 23.5" long x 7.5" wide x 16" deep. It has only been running for a few days, so I've got a while before I can put critters in. Right now it has three mangroves and some star grass (Halophila engelmannii), but I'll be getting turtle grass in about a month.
I really like the idea of a pair of captive bred H. erectus, however I'm not sure they'd be happy in such a small space. I also like the idea of a pair or more of H. zosterae, and I can handle the live food requirement, but I'm concerned about hydroids since the aquarium has actaul mangroves and sea grass that are likely contaminated and that are also dependent on a sand bed with live worms and other critters in it, meaning I can't add panceur.
So I'm looking at not having any seahorses, unfortunately, but maybe one of the companion fish would work. Does anyone have a recommendation of an interesting species that natually lives in seagrass and would be appropriate for my tank size?