hi all well i was given a complete fish set up over two weeks ago, 36/16/12 with two plecos one tetra one i think is a bottom feeder spends most of the time on the bottom and a red tailed shark eveything seems to be ok had the water tested. iam now looking to ad more fish what would you recommend looking for colour and easy to keep. also what would you recommend with regards to real plants or plastic. thanks.