5 year-old ADA aquasoil, time to replace?
Selling my 100 gallon and going down to an 80 gallon shortly.
The ADA aquasoil I have was bought sometime in 2006, and I topped it up in 2009.
It hasn't really broken down much, what did break down initially has long been vacuumed up.
Would I be safe reusing half of this substrate in my new 8 gallon and buying one or two new 9L bags of aquasoil to top it off? Or do you think the old substrate is totally exhausted of any nutrients?
I figured adding some of the old stuff to the new tank might help it cycle faster and get bacteria going quicker.