06-27-2013, 05:44 PM
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I can give you some recommendations on some good gourami species for that tank size and some to avoid. Some of these fish might be a little tough to come by but some are relatively common. In most tanks for small retiring gourami's you need to be careful of the tank mates. No fin nipping species, large aggressive fish, or overly competitive species. One good choice would be a Dwarf gourami (Colisa lalia). Males aren't very tolerant of each other but more peaceful than many other species. They are quite hardy, and fit your temperature range. They are not picky eaters either. I would recommend a quiet tank with many shelters, heavily planted and surface vegetation if possible. A plus for these fish is that chemistry is not a very big concern so as long as you aren't into the extremes these fish will be fine. Thick lipped gouramis (Colisa labiosa) are also acceptable for your tank but you would have to mind your numbers. Males can be intolerant and instead of a maximum of 2 1/2 inches these can grow to 4 inches long. They require similar conditions. Honey gouramis (Colisa chuna) are one of my personal favorites. I do not see them as often but if you do they would be one of the smallest and most peaceful gouramis or at least members of the Colisa genus. They are more retiring and tolerant. this is a very peaceful fish and though they seem delicate they are hardy when it comes down to chemistry. Just mind your tank mates. They actually require almost the exact same conditions as the previous. Pearl gouramis (Trichogaster leeri) can grow to 6 inches long so You could include few individuals of that species in a 30 gallon reasonably. They are relatively peaceful fish (just don't mix them with dwarf gouramis) but their size is a bit of a liability. I recommend a smaller species. Just in case you are interested in these fish for your tank they will accept most foods, like a well planted tank, with some surface vegetation, and open central area and subdued lighting is recommended. I really wouldn't recommend blue gouramis (Trichogaster trichopterus)because they fall into the same size range as the pearls with a harsher temperament. Fish I would avoid altogether include Giant gouramis (Osphronemus goramy), Kissing gouramis (Helostoma temminckii), snakeskin gouramis (Trichogaster pectoralis), Moonlight gouramis (Trichogaster microlepis), Chocolate gouramis (Sphaerichthys osphromenoides), and sparkling gouramis (Trichopsis schalleri). Some of these species are too large to be comfortable in a community in a tank that size. Others have special requirements not typical of other fish. Some just don't fit your temperature range. Just avoid them if you come across them unless you can provide the proper accomodations. The recommended species I believe will do splendidly in a tank like yours just be considerate of their requirements, tank mates and the fact that they are fish and need responsibility to be taken for their life in an aquarium.