it might work, but don't always think that Pearls will be a quiet and peaceful fish all the time, they can become a bit territorial and they can grow up to 13cm. ;)
:) their ventral fins are so long because in the wild the water they live in is murky with low visability, so their long ventrals are used for feeling around
depends of your tank size and the type of fish you house with your three spot gourami, if you have just one thats usually a problem as they focus almost entirely on attacking your other fish. If your tank is to small the 2 dwarfs are constantly being in his territory and they cannot escape. it's...
if you swirl the egg yolk it may possibly be accepted as all fry of almost every type of fish will only take food that is moving. Grounded pellets or any dary food are a bad indea at such a young stage as they will not be able to digest them as their internal organs have not developed yet. :/
i agree , you should get the kissers a new home. but don't forget kissers can potentially reach up to 30cm and three spot gouramis can reach up to 13cm. :)