my first tank is 14 gal bio cube and i like it except theres not much of space so i upgraded to 24 gal but its an aquapod..
i like the wet and dry on the bio cube, the aquapod doesnt have that..and theres a meter on the side that tells you if you need to top off(bio cubes)
just replace the bio balls with rubble rock or live rock that i cut in pieces(thats what i did)
then i put cut up filter pads..no skimmer just weekly water change and my corals were doing perfect..
24 to 29 is a good size for a nano..just do water changes and take care of the corals,have dedication and time..that will make them happy!