Here is some uppdate of tank number 1. with soil number 1. This is the tank with soil containing 30% cow manure:
The tank have been running for 5 days and today i have done some measures of the water.
Ammonium: 0,0 / no measureble readings
GH: 4,0 / the same as my tapwater.
I am not using a filter, just a bubbler to get some water movement. The water is still cristal clear.
I am not going to have fish in this little tank, only some shrimps that will arrive in about one week.
It looks like the plants have started to grow, but since there is no feeding to this tank do you think i should add some fertilizers? Or just relay on the soil/cow manure and just let the tank be with light and some water movement?
I appriciate any comments