So biting is out of the question? Got it.
What kind of bag are you running the Vertex in?
I'm just using a generic mesh filter sock. I'd like to get a reactor for it (actually 2 reactors. 1 for fresh and 1 for salt to rotate around my tanks. You're only supposed to use it for 1 week per month.) but I don't have the budget for it right now.
I've been so impressed with it I'm thinking of stocking it for the store.