Has anyone tried the traditional Japanese white charcoal for filtering purpose?
See
Binchōtan - Wikipedia, the free encyclopedia
This charcoal is pretty hard, and emit metallic sound when you strike it.
The product is used widely in Japan for absorbing odors and other chemicals. Some people even drop them in tea and wine or other cooking to change flavor. If they are safe for human use, it should be safe for aquarium too.
The question is whether it is a good choice compared to other products in the market.
See
Binchōtan - Wikipedia, the free encyclopedia
This charcoal is pretty hard, and emit metallic sound when you strike it.
The product is used widely in Japan for absorbing odors and other chemicals. Some people even drop them in tea and wine or other cooking to change flavor. If they are safe for human use, it should be safe for aquarium too.
The question is whether it is a good choice compared to other products in the market.