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Old 01/02/2018, 01:09 PM   #1
SWFiend
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What would cause brittle rocks?

I have Marco rocks that have been in my system for 2-3 years but over the past year they seem to have become super brittle like I can break pieces off and scrape layers off them only change is I started running my ca reactor again but ph of the tank is the same as before when I was dosing. Any ideas?


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Old 01/03/2018, 03:55 AM   #2
SWFiend
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Anyone?


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Old 01/03/2018, 07:37 AM   #3
Timfish
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Endoliths are going to be dissolving any calcium carbonate substrate even at the high pH many of us keep our systems.


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Old 01/03/2018, 09:56 AM   #4
rffanat1c
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Iíve read Marco rocks cause brittle rocks. Number one complaint I read about those rocks from day one when people bought them.


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Old 01/03/2018, 04:03 PM   #5
saf1
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How did you cure and/or start the cycle? I've read a few places that acid or bleach baths will remove rock. Pukani comes to mind.


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Old 01/03/2018, 06:35 PM   #6
jda
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It is probably the composition of the rock from where they were terrestrially collected.

Super low PH can also make rock brittle, but we are talking about in the 6.X range.


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Old 01/03/2018, 08:02 PM   #7
SWFiend
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Tank runs at 8.1-8.3

No acid baths or anything like that


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