You still did not say what species. If you cannot say and you have not researched at least the fundamentals; you have no business attempting to breed them!
Harsh..maybe; but true!
And why the sudden rush to breed an animal you know obviousl little about anyway?
You breed different color types and your result will muddy to wild type. It took countless generations to change them to solid colors, it only takes two hamhanded efforts the wrong direction to erase all those years of work.
Gourami are the easiest of the anabantoids to get to breed.If the tank conditions are right it is hard to keep them FROM breeding!
Dwarf gourami though, are far more like their betta cousins and are severely rough mates and aggressively territorial. A amorous male will chase an unwilling female to stress and will kill her if she still refuses. (not sexual...his take in nature is if she is not a potential mate she is a potential threat to the nest, eggs and fry..and should be terminated)
But the fry of nearly all bubble nesters nede closer to wild conditions to thrive. high temp, good very soft water. they are the smallest out there adn the Gourami are smallest of all the anabantoids.
you need a hospital tank to treat the female, you need a fry tank/breeding tank, you need a tank where the male can be housed after he is removed from the freeswimming fry. you need a culture of BBS or Microworms on hand BEFORE teh first fry become free. got any of that? Or did you even research taht far?
And what wil you do if you are lucky enough for a 100 of teh buggers to survive?
LFS get them far cheaper by mail than you can afford to sell them for. Betta splendens sell about a dime a piece if you are lucky. The
lfs may not even want females because their draber coloration. You growing juveniles may shred each other to pieces like bettas. If thes are a large gourami the shop won't take them til they are about 1.5-2 inches. that takes time if conditions are not perfect. If the fry do not all fade away.
I am rather a negative and crusty sort...I always assume a person who "suddenly" want to breed a labyrinth fish or rare fish , is thinking that it is waay lucrative because a few inflated prices here and there on the net and retail. But haven't calculated the cost of a proper set up for breeding or the time it takes to raise these animals to a viable age. If it was something you always admired and wanted to try...you should have done more research!