Re: Manure-soil mix

Ah! A man after my own heart. Optimal growth of most rooted aquatic 
plants can only be achieved using a fertile soil substrate. When I say 
optimal, I mean doubling times of 2 to 4 days. Yes, you still will get 
'good' growth on a highly organic substrate such as cow manure, but in 
controlled experiments there is VERY clear evidence (statistically 
significant, reproducible, and dramatic) that growth on a silt substrate is 
even better (see above).

Dr dave.