So last night after installing my skimmer I added some ammo carb to a media sock and when I woke up this morning my tank was black... I mean the sand had a light dusting of black all over it as well as all my rocks... I have since removed the ammo carb and stirred up the substrate hoping that it would filter out through the overflow... Any other suggestions? Also where do I want the bubble level coming upto in my euroreef? I have heard to about 1" below the rim of the collection cup...
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