Obmanta - if you go about it as we deicussed earlier in the thread yes you may just add as affordable. Secret is - when you first drain off water from main display - place all rock and corals in large tub with heater and PH's. Add fish and inverts if you have to (I like keeping them seperate). Use only your tank water to house them while reconfiguring tank. Once all CC is out I suggest putting down eggcrate or diffuser grid and building rock up on it. Use cable ties, or epoxy (reefsafe) but get aquascape stabe. Then fill in sand around it. As you add sand later get it wet and rinse in then scoop down to where you want to put it. The wife's cooking ladel (plastic) works well - but don't get caught (mine hollers using cooking stuff in tank). Each time you add you will get a short cycle.
Just FYI - In the begining of this thread I gave a plan for what you needed to do. I see it has gotten off track into the ongoing CC debate. CC an be used in a tank - but requires more maintainance. Also CC does not give near the surface area for bacteria to grow on as a regular oolictic type of sand. Also becuase of CC greater diversity of size water moves through it and you don't develope the oxygen depletes layers needed for denitrifying bacteria to develop. In short for most aquariasts the DSB
is easier and safer than a CC bed. That is just a FYI, never said CC won't work, but for overall nitrate reduction DSB
is way better!