Some breeds of Cory seem easier to breed than others but if you want to try breeding them I would suggest the easier ones first such as Peppered or Bronze. Getting them to lay the eggs is relatively easy the tricky part is actually raising the fry. The Gouramis could be a real challange to breed, depending on what type you have and how many the males can get pretty territiorial. To breed gouramis with some very general info I would suggest having either a piece of glass suspended just above the water so the male can make his bubble nest (if you have bubble nest types, not all of them breed this way) and it shouldn't all evaporate. Otherwise a large lily type leaf would serve the same purpose and could be easier to put in place than a sheet of glass. Some conditioning of the potential parents my be required (aside from providing them with more live food and other treats to get them in tip top condition) mainly I would think of lowered water level for a bit and then raising it again to simulate the coming of the rainy season. The change in water height would also to some degree include a change in water temp and this too might get the gouramis in the mood. Water chemistery will also need to be very close to their natural habitats water type. So much really depends on what type of gouramis you have to their exact requirements for breeding. Some gouramis can literally produce thousands of fry and they will need a lot of room if you are going to raise the majority of them.
All good fun!
