oo, im trying to decide wheather i should get more cons for my 30 or move my one con to my 55 gallon gourami tank. Ive told you guys in the past how aggressive they are. I told you how they killed an african cichlid. The pH level will be fine since Cons range from 6-8 and gouramis 6-8.8. I want to move him because i really want to make that 30 salt water. Do you guys think that will work out. He is a male can about 4 inches. and my gouramis are all male and about 5 inches except the Paradise which is about 4 inches (and the most aggressive fish in the tank besides the channel cats). o yea and the tank is very well planted, with many rocks and hiding places. It even has a 3 foot long pvc pipe under the gravel with elbows sticking up (in a planted tank i had nowhere for a cave for the channel cats, so i did that, they love it)