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Old 08-26-2009, 02:22 PM   #11
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You need to do your own testing if you're adding supplements. Adding stuff without testing will either waste money, kill things, or both. If you're adding calcium without knowing what your calcium levels are to start with, how do you know you need to add any? And how much. You really need to know what your calcium and alkalinity levels are, as well as pH. My guess is that one of the three are out of whack.

Regarding urchins... they'll eat coralline algae, so that could explain your lack of it. But I'd still expect to see *some* of it, somewhere. As far as I know, they leave coral alone.

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Old 08-26-2009, 03:01 PM   #12
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From what I can tell, and I'm probably mistaken, but if that is a Pencil Urchin then it will eat coral. But you're light seems pretty low. I'd stick with zoas, shrooms, softies, and some non-photosynthetic coral.

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Old 08-26-2009, 10:02 PM   #13
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i have a pencil urchin and he hasnet touched ant my softies or LPS's but i have alot of algae and I spot feed him a piece of a red algae sheet probably once a week also.. I also have a pincushion who grazes constantly and I spot him/her/it also, I don not think your urchin would be the cause for your problem unless it was starving and that was the only thing to eat...what type of coral do youhave? it looks like duncans or some type of branching LPS

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coral, corals

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