Good question.
Wish I had a good answer. In the morning before I turn the lights on I fill
the reservoir with a quart or maybe 1 1/2 quarts. That's a guess, I haven't measured it.
I put 1/2 tsp CalMag, 1/2 tsp BioMarine(liquid squid) 1/2 tsp BioBud, 1 tsp BioThrive Bloom.
In the afternoon I give it a little water with only CalMag.
I have been debating feeding twice a day. Either that or I could
increase the BioThrive Bloom 2-4-4 to 2 tsp.
-or-
I was thinking of adding 1/2 tsp of FoxFarms Tigerbloom 2-8-4 to the afternoon drink.