MIMedGrower
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Teaspoon is 5 ml. 5ml = 5grams. 2.5g per 5 gal.
So I would say 0.5gram per gal.
But the weight is different for different elements.
And even so. The directions say 300 gallons to 1.6 oz. which is 9.6 teaspoons.
The measurement for the half gallon i need tonight is immeasurably small.
Do i just weigh a half gram and go with it?
I really dont want to wing it. Lol