Alder cones and IAL turning black
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Old 04-03-2014, 07:50 PM   #1
SigmaMLK
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Alder cones and IAL turning black


Hello all,
One of my tanks with alder cones and IAL has turned them all a very dark brown to black color. I did a search but could not find out why. It's really odd because the alder cones and IAL have stayed the normal brown color in all my other tanks. The ph in the tank in question is at 5.0, but I have two other tanks with the same ph where they haven't changed color. Anyone know what this means?
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Old 04-03-2014, 08:04 PM   #2
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Means more tannins leached out.
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Old 04-03-2014, 08:07 PM   #3
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What about when cholla wood turn black on one side and not the other?
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Old 04-03-2014, 08:10 PM   #4
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Quote:
Originally Posted by Soothing Shrimp View Post
Means more tannins leached out.
Thx for the quick response! What would cause more tannins to leach out? It's really strange because the tank parameters are identical except for volume of water (20gal tank has black alder cones, while 4gal has normal brown ones, cones were introduced at the same time.
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Old 04-03-2014, 08:15 PM   #5
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All cones/leaves are not created equal. Purigen and water changes will lighten your water.
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Old 04-03-2014, 08:26 PM   #6
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All cones/leaves are not created equal. Purigen and water changes will lighten your water.
Ah I do have purigen in the bigger tank, does the use of it somewhat negate the positive effectiveness of the cones?
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Old 04-03-2014, 08:41 PM   #7
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Negate? No. It will just remove some of the tan so you can see better.
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Old 04-03-2014, 10:58 PM   #8
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Do you have good water agitation (O2) on both tanks?
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Old 04-04-2014, 02:31 AM   #9
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Yeah I have pretty good aeration on both, spray bar and sponge filter on big tank, and hob plus sponge filter on little tank.
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