I dunno, I sell them all for the same price. I suspect the price difference in wholesale is nickels and dimes.
See, the thing is, I had the bulbs there for that tank, but I didn't know which bulb was which. All these stupid metal halide bulbs come in the same generic white cardboard box with only serial numbers. That said, I went with the XM's since I could readily ID the kelvin temperature.
ANYWAY, let's not get sidetracked. I have a more objective question:
We've established that cleaning crews are, more or less, an optional part of a well planned set up. That in mind, what species does everyone have the best success with? How about total failures?
Here's a few of mine:
Good - Trochus snails, Cerith snails, and small conches.
Medium - most non-predatory brittle stars, sea hares.
Terrible - Astrea, Turbo, ALL HERMIT CRABS...
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This and that.
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