Like the title says. My G3 fills up with water in seconds. It's brand new and I have the output tube where the instructions(if you want to call them that) say to have it initially. Should I run it with out the collection cup until it slims up? BTW, I'm still cycling the tank. My ammonia is 2.0-4.0 and my nitrite are 1.0. Should I wait until after the tank cycles to run it and tune it?