Jets eliminated Miami....in a dismal season like 2013, what more could we have hoped for today?
As for 2-50g water changes, what is your system total volume?
Keep in mind, in nature the water on a reef probably changes dozens of times per day, at 100% each time.
Virtually all beneficial bacteria resides on your rock and sand, not in the water column. I've never had a problem with excessive water changes in a day, as you're proposing.
Russ