I have a 24ap and love it, however I removed all of the blue sponge on the right, its a nitrate fest. As well as the bioballs and ceramic medium (slowly over two or three weeks) and added LR rubble instead. I opened up ALL of the vents on the right hand side and inserted loosely rolled filter floss because it is cheap and can be thrown away every two or three water changes.
The main pump I replaced with a Rio 1200 which is about 295gph, its A LOT of flow, if you have non flow loving animals like xenia , I recommend something smaller. I also drilled two holes in the back of the tank to accomodate extra cords, but if you have the money to invest, rip the whole hood off and get a sunpod. They come in 20" at 70 and 150w MH. The tank runs MUCH cooler this way. The hood seemed to turn it into a pressure cooker. My PH stays up better as well thanks to the Oxygen exchange.
Heres the tank, you cant see the little powerhead I hid in the rock work.