na, 6 months is good, it should be the minimum time for any tank from what I have seen happen in local LFS.
The only way a large sump will have is increasing stability and success for longevity for the tank and inhabitants. anything smaller than a 33 is a nano to a lot of people, and with a 33 or smaller MH is a very real possibility for lighting.
heck I would put MH on a 15, if I could find a small enough set up
the only problem with a under/over 300 is that once you buy lights you are over
an idea might be to have a under / over 1000 on hardware, then do your preset price list with a limit on live stock but bring into account live rock and sand also. skimp on the rock and get nicer and bigger corals or fish, go heavy on the rock and you will limit the coral or fish, makes you decide and really think of what a good balance would be.
Steve
__________________

*everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.