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Unread 10/22/2018, 07:59 AM   #14
Piper27
I love bengals
 
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Join Date: Feb 2011
Location: Manassas Virginia
Posts: 2,512
Iodine is depleted from the water very fast, and hard to accurately test for. Adding a drop every few days should be enough to take care of any problems related to it if there are any.
What are you using to test SG and how are you calibrating it? I have seen issues like that with SG swings or is off.
The pest snail problem looks to be all over your rocks am I right? If they are I would find a solution to them because they can cause irritation and slowly kill off corals in their general area if they aren't flourishing. Small tanks with a large population of them will have a hard time growing sps because of all the webs. I think that could be your main issue. Although the low alk and high nutrients could have been irritating corals as well. I would have kept the very small dose of vinegar you were using but that's just me, I doubt that small dose would hurt anything.

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