Some Sparkling Gourami may not eat processed food. Ask about diet. Most eat live food.
Some info from an article "For a bit of flash in a peaceful nano tank as small as 19 liters (5 gallons), a group of sparkling gouramis is a wonderful choice. Not for the novice, but still reasonably simple to keep, these fish require soft water and an acidic pH of 5 to a maximum of neutral (7) and are reported to occasionally, with some coaxing, accept pellet and flake foods. Do note that these fish have been reported by several as shrimp assassins—being a micro-predator, this is not surprising. When kept in numbers, they have even been said to hunt prey in groups and behave like a pack of sharks at feeding time, with one zeroing in on the prey, snatching a bite, then whisking off while the rest take their turn in the frenzy. This behavior, while I have not witnessed it personally, sounds fascinating and quite unlike many of the more familiar gouramis.
Sparkling gouramis are quite fine nano community fish, though due to their timid nature and small size of 4 cm (1½ inches), they must be housed with similar, teeny-tiny companions, such as micro-sized rasboras, ember tetras, smaller cory cats, scarlet badis, white clouds, otos, etc., and preferably in an aquarium that is well planted and understocked. Though some are said to behave around ornamental shrimp, given their hunting proclivities, I would not trust them with your prized Caridina. A densely planted setup with floating cover (e.g. hornwort, Riccia, long-trailing stem plants, etc.) is strongly recommended, as these fish enjoy diffused light and need to retire when stressed and swim among vegetation to truly display their natural behaviors. Needless to say, they will also develop their best colors and look brilliant against a planted backdrop."
I like to see Cories in at least a 10g but if it's well planted and kept clean they may be ok.
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