Brown Sugar as Fertiliser???
I am new to this forum from India, have read a few topics but this is my first post.
I currently have a low tech 40 gallon planted tank with an inert substrate (coarse river bed sand)
Can i use the brown sugar having the following ingredient in each 100gm as a fertiliser dosing for my magnesium requirements?
Potassium 126 mg
iron 1 mg
apart from the above, what naturally available resource can i use to treat iron deficiency in my tank?