How many fish in a 50?? :)

[gregzz4]

Why don't you try running 2 foams in the Aquaclear and alternate rinsing. Plus some carbon and read about the Zeo-carb.
Now, here's a useless suggestion considering your time frame, but maybe you should put some biopellets in your Aquaclear and in conjunction start dosing Stability daily at twice the dose ( since you're going shopping anyway ).