I have used Zeolite in my planted tank. I found it is an effective ammonia remover. The end result is nutrient inbalance and algae get invited!
I suspect zeolite interrupt with the Nitrogen Cycle as it constantly removes ammonia,NO2 & NO3. I have a pale color leaves and algae in the end.
IMHO, if zeolite is used as substrate, would it absorb nutrient and leave your plant root starving ?
Now I have removed them from my filter media, plant looks healthy once again.
Last edited by xberia; 06-15-2006 at 04:53 PM.