I will need to change how my aquarium is stocked soon and i was hoping that you guys could help me with some appropriate stocking. I have sand with a Marineland Penguin BioWheel150 and a thermometer and heater and an airstone with a bubbler. I was ignorant about the stocking at first and my tank has a pictus 4 rainbow shark 3 tiger barbs and a bumblebee cat(smaller variety). Freshwater and my pH is about 7.4