Grow out tank/frag tank setup question

[StikHedRon]

I'm wanting to setup a 40 breeder asa grow out tank for sps only. This tank will have its own sump and be bare bottom with nothing in it but some acrylic racks. I may put one fish in there. Do I need to add rock to my sump or can it be successful without any biological filtration?

 

[reef lover]

without biological filtration theres nothing to turn ammonia to nitrite and nitrite to nitrates and corals do produce ammonia just like fish, so if it was mine id have a refugium in that sump with plenty of live rock and macroalgae.

 

[StikHedRon]

Thanks!