Safe Rock? - Tropical Fish Keeping - Aquarium fish care and resources

 
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post #1 of 5 Old 11-18-2009, 03:26 PM Thread Starter
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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.

Kindest Regards,
Amanda

Keeping fish its not a hobby it is a passion!

55 gallon, 44 gallon, one 20 gallon tank, three 10 gallon tanks, and a 2.5 gallon all with real plants.

I have MTS and there is no cure.

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post #2 of 5 Old 11-18-2009, 04:34 PM
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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.

~ Life Is Too Short, Break The Rules, Forgive Quickly, Kiss Slowly, Love Truly, Laugh Uncontrollably And Never Regret Anything that Made You Smile.
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post #3 of 5 Old 11-18-2009, 06:24 PM
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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.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #4 of 5 Old 11-19-2009, 08:15 AM Thread Starter
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Thanks you guys. I think I will just be on the safe side and just not add it.

Kindest Regards,
Amanda

Keeping fish its not a hobby it is a passion!

55 gallon, 44 gallon, one 20 gallon tank, three 10 gallon tanks, and a 2.5 gallon all with real plants.

I have MTS and there is no cure.

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post #5 of 5 Old 11-19-2009, 08:30 AM
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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.

~ Life Is Too Short, Break The Rules, Forgive Quickly, Kiss Slowly, Love Truly, Laugh Uncontrollably And Never Regret Anything that Made You Smile.
Life May Not Be The Party We Hoped For, But While We're Here, We Should Dance. ~
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