Are these rocks aquarium safe? Anyone know? - Page 4 - Tropical Fish Keeping - Aquarium fish care and resources
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post #31 of 35 Old 05-11-2010, 09:58 PM
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Mine was a little crumbly after I used a hammer to break it up. Mine did not have many sharp edges. If you are concerned put a towel over the rock and break off the sharp edge. You can use one of those bath netting sponges and take that apart and get some java moss and attach that to the rock. Put the netting over that and twist it on the bottom and use a tie wrap to secure it and you have a really nice moss rock. Easy to trim and take out. I'm glad you got that for free as they know they can't sale broken peices.
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post #32 of 35 Old 05-11-2010, 11:06 PM Thread Starter
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How do you break off the shap edge? It has likeeee lots of different edges since it's kind of crumbly. I'm pretty sure it's shale and not slate :/ so might go back and look for slate idk.

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post #33 of 35 Old 05-12-2010, 06:20 AM
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If it passes the vinegar test (or even better, a test with a stronger acid such as muriatic acid for cleaning pools, pH Down or the nitrate test bottle that says "danger: contains hydrochloric acid" or something like that) it should be fine. Some shale contains a decent amount of calcite but not all of it does. I have red shale in some of my tanks.

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post #34 of 35 Old 05-12-2010, 10:58 AM
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I'm not sure what mine was. Maybe it was not slate. Some of my peices are a little pointy but are fine with my fish and my tank and I have had them in for sometime and no problems.
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post #35 of 35 Old 05-13-2010, 11:17 PM Thread Starter
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Hey guys,

I picked up some more rock... if anyone has any idea what kind it is (I think it's slate... but I'm not sure :/.... it's kind of sparkly, is this bad?

Please let me know if you have any idea. It passed the vinegar test. Now the PH test.

It looks shinier cus the water + flash so keep that in mind.
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"He situates himself in relation to time. He takes his place in it. He admits that he stands at a certain point on a curve that he acknowledges having to travel to its end. He belongs to time, and by the horror that seizes him, he recognizes his worst enemy. Tomorrow, he was longing for tomorrow, whereas everything in him ought to reject it."
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