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#1
02-14-2013, 05:30 AM
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I would be concerned about HHLE. There is a lot of info about this on the web, of particular concern is activated carbon.
Dan
__________________
Link to my Tank Upgrade Thread Dan Leus, Marine Biologist 20+ Years Marine Aquarium Experience Save the Reef, Buy a Frag! 
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#2
02-14-2013, 01:57 PM
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Did it just show up one day or have you noticed it getting worse over time? If it just showed up, then it probably scratched itself on a rock. If it has been getting worse over time, then I would think there is potential for HLLE.
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