Hey guys, I'm planning on setting up an aquarium to house one 2" baby Medinai Piranha...if i can get my hands on one. I'm planning on buying a 29g tank, with a an Emporer biowheel 280, Marineland Power Head 660, Aquarium Systems Visi-Therm 150 Watt Heater. Is the power head enough to creat oxygen? Or do i need anything else. Thats the biggest tank i can get as of right now. I'm sure i'll have to upgrade later on. What do you guys think of this setup?? anything i need to change? Thanks for any info!