yeah man they are. but so are P's and numerous other things. you can obtain them if you know the right people. id say it is much easier to find caulerpa here than rays or snakeheads.DeLgAdO said:arent Caulerpa illegal in our parts cm?
reefcentral does indeed rockmkman said:Like the person above me said, go for a skimmer.
I had a 65 gal sps dominated reef tank that I took down a few months ago.
I used a skimmer and dosed kalk nearly every day and the water was very clear. I did 10-20% water changes about every 2-3 weeks.
I would recommend this website. Its the best website for anyone wanting to know about saltwater and reef.
www.reefcentral.com
A refugium definitely has its pros and cons. Why not have a refugium and skimmer?
I think if I ever go back to reefing (I'd rather have a big pond with monster size fish), I would have a sump/refugium and skimmer as my filtration (live rock a must too).
and i already mentioned having both a skimmer and refugium. you must have misunderstood what i said. and why wouldnt you do both a pond and a reef or a reef pond. gotta love the reefer 

mkman said:Oh by the way, get cheatomorpha. It grows fast so you can sell it back to your lfs or trade it online to other people. You can find it most likely at your local fish store if they carry a large saltwater section.
They look like green clumps of tumbleweed. If you have this in your main setup, you'll have lots of small organisms living in it like copepods that your fish or certain corals willl eat (corals will eat the eggs of these pods)
You could also have it in your sump as well.
As far as a deep sand bed (DSB) go to reefcentral.com Big debate over dsb's that you may want to read and learn more about.
You may be losing trace elements to water changes, skimmer, activated carbon, etc so you may want to look into using some supplements.
Oh yeah, in case you might be thinking about this, I would recommend a product called cyclopeeze. Your fish will love it! You put a little bit in and within 2 seconds, your fish are going nuts for the food.
Hope this all helps