If by feeders, you mean fish (as in feeder guppies)- no. You should not be adding any more fish until the tank has stabilised, which will probably take 4-6 weeks.
What you need to do now is to do a partial water change- take out 40-50% of the water ( a syphon is handy, you can buy them cheap at the pet shop) and replace with water that you have dechlorinated (using dechlorinator from pet shop) and brought up to tank temperature either with water from hot tap or water from kettle. Do that straightaway. The next day do another smaller one, say 20-25%. Then keep doing a 20% water change every day and test every day (before you change) for ammonia and nitrites- keep to this regime until there are no readings for either.
Which gourami is still alive? If it is the dwarf, we'll keep fingers crossed for him, they are sensitive but if he can cope with this he should be alright. If it is the kissing gourami, he is going to grow too big for your tank, so you will need to rehome him eventually- or buy a bigger tank.
During this cycling period, feed very sparingly, maybe only every other day. They can catch up later, the important thing now is to keep the toxin levels as low as you can. Good luck!