Nitrogen Cycle Bacteria..Bio Filtration

[danny]

Diane Walstad's got a couple of aquariums she hasnt changed the water in for a year plus. Grab her book if your interested.

so are they nitrate free????????

 

[King Edward]

They are not nitrate free but they are within normal levels... I'll dig the book out and see if I can find any figures. Plants 'eat' nitrate. They prefer ammonia, but in the absence of that they take nitrate, so if your plants are growing they are removing nitrate from the water.