media baskets

[storm1210]

hi i wonder if any one could help i am new to marine set up a fluval evo and put media baskets in both chamber and plugged the hole in tank the water in the main tank runs fine into chamber 1 recently upgraded return pump but the water will not flow over chamber 2 i have tried turning the punp down but cant seem to get the water level right i have reduced what is in the baskets as well any help would be appreciated thanks

 

[blaxsun]

I think I got lost at "plugged the hole in tank". Maybe an image or two would help to shed some light?