Hypertufa? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 07-05-2011, 02:26 AM Thread Starter
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Hypertufa?

Does anyone have any opinions on whether hypertufa decorations would be aquarium safe (not toxic)?

Hypertufa is made from Portland cement, perlite, peat, and maybe some sand. I know the last three ingredients I listed are safe... At least I think perlite is safe.
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post #2 of 5 (permalink) Old 07-05-2011, 03:47 PM
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Safe, most likely yes.

Mess with water parameters? Definitely. The cement will raise kH and GH, while the peat will stain the water and counteract the cement a little. I'm guessing the cement would win - causing the kH and GH to rise between water changes.

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72g bowfront planted, CO2, 4x - T5HO, Eheim 2213 and 2217, 2 angels, pristella tetras, blue tetras, betta, albino bristlenose pleco, albino cories. Sword, vals, hygros, ludwigias, java moss and fern, anubias

2g Mac-quarium. Clown gravel, fluorescent plastic plants, and 2 guppies.
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post #3 of 5 (permalink) Old 07-05-2011, 07:16 PM Thread Starter
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Like raise them to a snail happy level or to dangerous levels? And would it just keep changing the water or eventually become inert?

Thanks.
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post #4 of 5 (permalink) Old 07-05-2011, 08:08 PM
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If you do weekly 50% water changes it might be OK - but you're going to have two parameters constantly changing. It won't hurt the fish, but the plants might not be as happy as they could be. Also you won't be able to use a pH controller to run CO2 - your target pH will be changing as the kH changes.

The peat will lose its effectiveness (as a softener and water-stainer) after a while, but the concrete will keep leaching as long as it's there - it's basically calcium carbonate (like limestone).

Kevin

72g bowfront planted, CO2, 4x - T5HO, Eheim 2213 and 2217, 2 angels, pristella tetras, blue tetras, betta, albino bristlenose pleco, albino cories. Sword, vals, hygros, ludwigias, java moss and fern, anubias

2g Mac-quarium. Clown gravel, fluorescent plastic plants, and 2 guppies.
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post #5 of 5 (permalink) Old 07-05-2011, 08:10 PM Thread Starter
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I guess hypertufa in an aquarium isn't a good idea then.
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