Humm, I posted that comment a while ago. I find feeding Zoanthids very difficult, but not impossible. It required me to do spot feeding and fending off the fish while the zoas ate.
My Palythoa on the other hand are voracious eaters. They're much easier to feed and consume the food fast enough to keep the fish away.
This does help growth, but it is a lot of work. The problem is when you don't have time to feed your zoa's every night, or stop altogether. I have seen colonies recede after I stopped feedings.
IMO, I am not a proponent to spot feeding zoas all the time. I find it to be difficult to maintain and it contributes to alage growth around the colonies.
I would feed zoas that are not doing well or growing way too slow. That will help kick start the colony, but I wouldn't do it indefinitely.
Also, watch for new algae growth. If it starts to bloom, cut back on the feedings or filter harder.
I agree about raising the temp, but conditionally. Raising the temp would help if the temp was real low (73-75 degrees), but if you're already running the temp higher (79-81 degrees) it's dangerous to go higher. The reason is if you run the temp at 82 degrees, on a hot day it has the potential to jump to the dangerous levels quicker (86-90) which will result in death.
I wonder, why was this thread dug up?
my zoas exploded after not doing water changes, just top off, for about 3 mos. my tank is established, so i wouldnt suggest it if u just started. 
