Rocks that don't affect kh/gh/tds - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 02-21-2013, 09:55 PM Thread Starter
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Rocks that don't affect kh/gh/tds

Are there specific rocks I can look for that won't affect the tds, kh, or gh of my water? I know some affect these parameters but I don't really know how to tell without putting some in RO water and testing it... but I don't want to have to buy a bunch of rocks just for testing.
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post #2 of 8 (permalink) Old 02-21-2013, 10:00 PM
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Definitly not seriyu stone lol
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post #3 of 8 (permalink) Old 02-21-2013, 10:09 PM
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Yamaya, ryou stone and a few others. Go here and look at the descriptions on their stones. I just wound up skipping rocks in my tanks because I didn't want the worry but I sure would like to use some in some new setups I hope to do down the road.

http://www.adgshop.com/category_s/114.htm

Also, you can buy resin/decor rocks that are inert but they cost a pretty penny.
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post #4 of 8 (permalink) Old 02-21-2013, 10:19 PM
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lava rocks are very popular with shrimp.
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post #5 of 8 (permalink) Old 02-21-2013, 10:28 PM
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Quote:
Originally Posted by ravensgate View Post
Yamaya, ryou stone and a few others. Go here and look at the descriptions on their stones. I just wound up skipping rocks in my tanks because I didn't want the worry but I sure would like to use some in some new setups I hope to do down the road.

http://www.adgshop.com/category_s/114.htm

Also, you can buy resin/decor rocks that are inert but they cost a pretty penny.

I guess going along the same line you could use just about ANY rock if you clear coated it.

RAOK Club and BBRR Club! My thinking has been invert-ed!
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post #6 of 8 (permalink) Old 02-21-2013, 11:00 PM
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Yeah sure you could if you wanted to spend the money (that stuff is PRICEY cause I already priced it out a long time ago).

And as another poster mentioned lava rocks are inert, I use them in most of my tanks.
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post #7 of 8 (permalink) Old 02-21-2013, 11:56 PM
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I saw this but I don't know if you are interested. Black lava rocks. 10lbs for $21 dollars.

http://sandiegofireglass.com/shop/12...ack-lava-rock/
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post #8 of 8 (permalink) Old 02-21-2013, 11:59 PM Thread Starter
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I'm setting up a new 20L for either crystals or TBs and am looking for the centerpiece of the tank. Maybe a large hunk of black lava rock will work. Only concern is some people on fish forums have mentioned that lava rock can absorb chemicals and heavy metals, so I'm a little worried about buying it from a landscaping company or such.
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