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I never planned on having an urchin. I guess this guy hitchhiked on my rock when I got it 1.5 years ago!! First time I am seeing this urchin. It is moving on the walls. It is 1.5", black/dark brown body with pinkish/brownish cone-shaped spikes (thick at bottom and sharp on top). No rings...

A while back some nice reefers here told me all about the benefits of actinic lighting & told me to put actinic bulbs in place of my regular NO lighting but some mysteries still remain... Is there ANY actinic 03 bulbs available in regular Normal Output fluorescent? Or is Actinic 03 just a term...

Has anyone seen a 23" NO actinic bulb anywhere? I have looked and looked but they all seem to start at 24". I am looking for a 20 watt but at this point any wattage will do. Any help is much appreciated.

Hi, I am trying to figure out where to get the following foods. Do I have to find a LFS that sells these or can I find these at seafood/grocery stores? Also if you know of any online places that sells these and doesn't cost an arm and a leg, I'd appreciate a link. - Krill - Mysis shrimp -...

I have 1 x 175w 10k MH + 2 x 25w NO florescents. Do I really need to get actinics too? What is the purpose of actinics?

Hi all, What a great site...just found you guys n I am glad I did. well, I have a 55g reef tank with 100+ lbs of live rock and a 4" dsb, 1x175w mh + 2x25w NOs. I have a 5g sump but run a hot skimmer. I've been at this hobby for almost a year now and loving it more each passing day. I look...