Quote:
Originally Posted by oilyfan
Rock being paramagnetic changes the ion exchange?
I think you got scammed.
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They use lava rock / pumice stone for nitrate filtering in many large aquariums around the world.
The principle's sound... just not sure on the actual effect putting 3 of these rocks in the dog's water dish has. (the scientist side of me wonders on the time factor for the rocks to actually work)