What are the pros and cons for drilled tanks vs non-drilled? Ive got a 125 gallon tank in mind and dont know whether I want or NEED it drilled or not. Im plannin on keepin a clown fish, redtail cat, shovelnose, and a few peacock bass... im gonna buy them all small sooo 125 should be big enough for the time being...any help or info on drilled vs non drilled and the filters suggested for me will be greatly appreciated, THANKS!!