Okay, I have a 300 gallon aquarium up and running with a 75 gallong sump tank underneath. I bought a box of bioballs that said it was good for an 85 gallon aquarium. I put all of the bioballs in my 75 gallon sump. Is this enough for my tank or do I need to buy more bioballs? The tank has been running for about a week-and-a-half now.