Safe Rock?
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Safe Rock?

This is a discussion on Safe Rock? within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> How can you tell if a rock or group of rocks are safe for an aquarium? I am getting another 20 gallon this weekend ...

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Old 11-18-2009, 04:26 PM   #1
 
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Safe Rock?

How can you tell if a rock or group of rocks are safe for an aquarium? I am getting another 20 gallon this weekend and my dad has some interesting looking rocks that I would like to use as decoration. Some of them are stuck together with concrete so I am not sure if they would be safe or not. I think they would give the tank a nice natural look with the plants I am going to be putting in there.
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Old 11-18-2009, 05:34 PM   #2
 
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The one's stuck with concrete, I can definitely NOT suggest to put n the tank because over time this concrete WILL turn your water into liquid concrete.
Does he have any 'loose' ones for you w/out the concrete? If so those COULD be an option for the tank, but you gotta check, drip vingeaer on it, if it bubbels up just a little bit, this also means the rock will turn your tank into liquid concrete.
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Old 11-18-2009, 07:24 PM   #3
 
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What Angel means by "liquid concrete" is very hard water, the last thing you want for plants or soft water fish. Calcareous rock (limestone, marble, lava, dolomite, coral) slowly "dissolves" adding calcium to the water and raising the hardness (which is basically calcium and magnesium) and pH as well. The vinegar test usually works, though some argue that vinegar is not a strong enough acid (after all, we do drink/eat it on food). The acid which I think is in regent #2 of the nitrate test kit is better, a stronger one. if it fizzes at all, don't use it.

The other thing is rock can absorb all sorts of toxins like pesticides, oils, anything it may have come into contact with. It is always a risk.

Byron.
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Old 11-19-2009, 09:15 AM   #4
 
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Thanks you guys. I think I will just be on the safe side and just not add it.
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Old 11-19-2009, 09:30 AM   #5
 
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That is indeed the best you can do!

If you have access to a country side lake or river that's really far from any industry or waste place you cn find nice one's there and do the vinegar test. Alternativly safe & quick is of cause a trip to your local fish store.
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