How many freshwater african siclids can i keep in a 20 gallon high tank?

i got a 20 gallon high tank with 2 gourami a pearl n a gold n i saw african siclids at PD 4 3.25 a peice still babys n they r very colorfull fish i may need to sell my gouramai as they may get killed i also have a stried raphael idk if they will attak the striped as its a nighttime fish is it possible to trade my gourami 4 2 siclids and tank is also planted with anubis how many adult siclids can my tank have oh btw they r freshwater fish right i was told they r but sometime they dont know sqwat about the fish they sell