Charcoal meant for barbeque contains a layer of chemcials that makes it more suitable for the barbequing purpose... If you want to use charcoal for aquascaping, buy charcoal from nurseries, especially those meant for orchid growing...
But do note that charcoal adsorbs chemicals and so you will have some initial problems with fertilizing and medicating... After saturation, the charcoal will release the adsorbed chemicals back into the water... Usually this is bad news if you had been medicating...
Bookmarks