i am about to get a 55g tank and i'm planning the fish right now. i'm going to put the fish i have currently in my 20g in the 55g which are 4 zebra danios,3 guppies,3 neon tetras, and 6 cory cats. i want to make it a community tank with maybe a pleco, other various tetras, mollys or platies. do you guys have any suggestions? my main question would be what kind of centerpiece fish should i get? would blue gouramis do well in that kind of tank and how many? thanks!