Yes they do but they also eat animals (insects) because they are omnivores not herbivores.
i feed mine topfin.
Kissing fish or kissing gourami, typically eat benthic algae and aquatic plants, they will also eat insects taken from water's surface. Kissing fish also filter plankton from the water and scrape the algae from stones. Cooked lettuce is a good alternative for kissing fish kept in an aquarium and any kind of live food.
In my case with bladder snails they occasionally pick one off of some floating plants, and as it falls catches it and sucks the flesh out! It really id entertaining.
Kissing gouramis (Helostoma temminicki) are Anabantids and build a bubble nest in which to guard and rear their ova (eggs). It is not likely that they will breed for you until they are adult and over 10 inches long
No. Gouramis will be very aggressive to the tetra.
Would be pressing the limits, some fighting could occur if territories overlap or lack of housing, but might be workable if properly filtered, aerated and maintained. A higher bio load could mean more frequent water changes.
you don't
Gouramis aren't really great fish to have together unless they have room to move around (e.g. at least 5 gallons per fish). Your tank is MUCH too small to have two gouramis, they're fighting for territory. If you don't want to return one to the fish store, then you should definitly just get a bigger tank. Unless you have dwarf gouramis, you should have them in at least 20 gallons. It also depends on what kind of gouramis you have. Some are more social and are more likely to school (dwarf gouramis, pearl gouramis) whereas others prefer to be top dog (opaline gouramis, blue gouramis). Good luck!
There is no easy way to determine the gender of the kissing gourami (helostoma temminckii), since there is no apparent sexual dimorphism. I suggest that you wait until they reach adulthood; the one that lays the eggs (ova) will be the female, and the one that is doing the wrap around will be the male.
If the small fish are small enough to fit into the gouramis mouth then they will almost certainly be eaten.
They grow to be 1 and 3/4 inches when they are adults.
tropical flakes!
No, gouramis are egglayers.