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i use lumenarc mini reflectors. i would consider them good. some of the more light demanding sps don't do well on the bottom. i tried some 20k xm's in a 400 watt fixture with the same reflector, thinking that i can get away with the lower PAR lamp since it was a 400...and my acropora started...
i would suggest much less than a 30" depth, or accept the fact that you'll be using a series of 400 watt halides, and not picking up anything that falls on the sand bed without a snorkel. ;)
my tank is 25" deep, and i'm getting rid of it for that reason.
i can't feed the lps, i can't pick up...
i would not add anything to the tank unless you are absolutely sure you are low on it, and then i would not add blindly, as you were suggesting. i would test the water and then add exactly what you need, and not a milligram more.
i have a series of aquariums all plumbed together that make up...
target feeding isn't necessary, but they seem to benefit from a good meal now and then. weekly is fine.
as for placement, acans don't need alot of light. be careful not to scorch them. i have sold acans to folks that put them under alot more light, and they are alive, but not as colorful and...
i think you answered your own question-
"I've looked at some of the nanos of the month on RC and it seems like some of these guys are all over the place on the level of light they are running"
i would say that the lowest light that someone is successful with, who is using a tank like the one...
i drilled the rock and used acrylic rods i purchased from an online source (www.tapplastics.com).
i used a basic masonry bit and drilled all the way through all but the top and bottom pieces. the bottom piece being the largest was the base, and the top is the "cap" to hide the top of the rod...
hard to say for sure, but sure looks alot like the mithrax crab pictured in this link (the mithrax group, 3rd row down)
http://www.chucksaddiction.com/hitchcrabs.html
na. the only time they will eat a coral is if it's already dying. many people blame the worms but they are just doing what they do..cleaning up the dying flesh.
there are worms that eat different things, but this worm is a common bristleworm and not a coral eater.
i suppose when you target...
it looks like a mithrax crab to me. a relative to the emerald crab(also a mithrax crab). it probably exhibits the same behavior as well. i don't think the death of the snails and this guy are related, but, you never know with crabs.