What rocks are safe? What about Grapevine? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 09-12-2004, 06:18 PM Thread Starter
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What rocks are safe? What about Grapevine?

I have some really cool looking rocks I found at work..various types..dunno what they are. LFS guy said he might be able to id them.. Or I can get pix to post online..
And, is grapevine safe or not? OLD grapevine I mean.. other LFS has some..old and dried,etc..heavy. Said not safe, someone used it and it turned his tank funky colored (even after boiliing). Course, my tank water isn't crystal clear when siphoned out into a white bucket either..with all the plants and driftwood..
somewhere online I thought I read Old grapevine was fine..
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post #2 of 3 (permalink) Old 09-13-2004, 12:49 AM
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You can test the rocks by either chipping off a small portion or making a good scratch in it. The idea is to get a fresh face. Then take some strong acid, vinegar will not work, and place it on the fresh face. If it bubbles, fizzes, and/or smokes don't use the rocks.

Grapevine will work fine. And yes it will discolor the water. To help with this problem either boil the wood, changing the water a few times or submerge it in a container, changing the water every week or so for a few weeks.
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post #3 of 3 (permalink) Old 09-13-2004, 01:03 AM
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Muriatic acid works well in Rex's scratch test. Just be sure to handle the acid with care!!


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