Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I make 2 mixes.
1) Macros- N, P, K, Excel
2) Micros- CSM+B, chelated iron, Excel
Dose all tanks a certain amount based on size (mostly) and plant volume (a couple of tanks). I use syringes (w/o needles) to measure each dose in ml.
Since I have a lot of tanks, a lot of gallons worth of dosing, I use two 2 liter bottles.
How to mix:
Put the amount of each powder you want for all the tanks for 2 weeks in the bottle.
Add some volume of water that makes dosing easy. Easy to figure out dosing: .5 ml per gallon of tank size, 1ml per gallon, 2 ml per gallon.
For me, to dose all the tanks 6 times in 2 weeks needs 2000 ml of water (2 liters)
More concentration means less dose per gallon, but do not make it so concentrated it will not dissolve. Less concentrated means there is more room for error, but you might not be able to mix enough fertilizer to last a long time.