From my experience in Ga. a fertlized pond is the only way to go, some carp will probably be helpful but an unfertlized clear pond is no fun in this area the ponds just seem to die with no food source. Just remember to keep the visability at around 24 inches. You have spent the time and money on lime so might as well give it a try. My experience after going years with no fertlizer and now is 100% positive to keep a light bloom on the pond as soon and as long as possible. Just remember to start slow and give it time to work.