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Discussion Starter · #1 ·
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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