That is pretty much standard amongst message boards now-a-days. If you look at your post, the only three letter word that would really benefit being in the search is pox. All the other three letter words are pointless to index like; the, are, too, for, all.
Now just imagine that over the hundreds of thousands of posts we have here.
You could use google to do it. Try searching for the following in google:
site:aquariumadvice.com/forums zoanthid pox