Originally Posted by Tim Wilson
Nevermind the efficiency of the brewer, quality and amounts of inputs, length of brew.
With no microscope and assuming a powerful air diffusion around 36 hours is a good estimate; It should no longer smell like the food sources (molasses etc) and should not smell foul but more like earth or mushrooms.
Tim,that's about as simple as I could hope for. Using my setup,it seems to still smell like the fish hydro after 48 hours.