Just a quick question about the amount to fert.
We have to add 1 ml per 30 gallon, thats ok, but how do we measure the amount of water??? Is the total volume of the tank, ex.: 90x45x45 cm = 180 liter
or is the real volume of water that counts, e.: 180 liter - 20 liter of akadama = 160 liter??
Thanks in advance
