I have set up a new sump and i am getting to many micro bubbles. I believe this is due to the fact that i have a mag 18 on a 75 gallon. I purchased the pump recently after some bad advice. I did not like the amount of flow from the beginning. Is ther anyway that i can slow the flow on the mag 18 such as a ball valve. And if not is there anyone else out there that needs a bigger pump and would like to trade.