Hay nice tank.
I think you would be well advised to get a sump to put all that equipment in. It would give you much more room and a larger volume of water not to mention a place to acclimatize new additions.
Can i ask how your getting on with your aqua-clear power heads ?. mine seem to produce a lot of heat and micro bubbles even when there fully submerged.

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Remember people the solution to pollution is dilution... weekly water changes!