Here is my classroom system - you can see pix in my gallery:
> 120 gallon diplay, 40 gallon sump, 10 gallon frag - barebottom
> AquaC EV 180 with John Guest fitting (for ozonizer) overdriven by a MAG 9.5 for wet skimming
> GEO 612 calcium reactor w/Pinpiont pH controller
> 2x250 DE MH's (10K AB's) + 2x110 VHO Superactinic
> three SEIO 1500 Superflows, 6 Maxijet 1200's (2 with hydor rotators)
> Lifereef Double overflow (1600 gph), MAG 18 return
> 2 phosban reactors - 1 with carbon, the other with Phosban
> Kalkwasser drip 1-2 times per week
> No additives at this time besides water changes
> Tropic Marin salt, 4-stage RO/DI
Here is an old pic of the entire system in the back of my lab with the DSB (Southdown) - too much algae for the SPS: