Really can't tell you as it would depend more on your stand than anything. IMO
, getting macro in there is much more important than more rocks, if you have 1lbs per gallon in your DT, and a deep sand bed. Any chance at extra room can give you the ability to add more goodies, or get them out of your DT. I have the smallest aqueon sump that they sell (didn't have time to make one due to work), but have my heater, fuge w/ cheato and ~3k pods
, and a uv
sterilizer in mine. I had my skimmer in there, but when I upgraded my tank my new return took up to much room so it went back to HOB
. Really miss having it in the sump.