Well let me see if i understand everything

I'm used to liquid solution, litters and grams so i will use this units

and i will use

Chuck's online calculator
I'm going to try EI in a 30 litter water tank (7.93 gallons) so will pick the 10-20 gallon example (off course i will reduce a little the fertilization, but thats a detail for now)

**10- 20 Gallon Aquariums**
+/- 1/8 tsp =

**0.125 g** of KN03 (N) 3x a week

+/- 1/32 tsp =

**0.15 g** KH2P04 (P) 3x a week

+/- 1/32 tsp (2ml) Trace Elements 3x a week

50% weekly water change

As i say i will make a 250 ml of KNO3 and 250 ml of KH2PO4 and i will fertilize 5ml 3x a week. So by my math:

**KNO3**
6.2 g for 250 ml = 0.51 ppm => 0.51 ppm * 5 = 2.55 ppm = 1/8 tsp of KNO3

**KH2PO4**
7.5 g for 250 ml = 0.7 ppm => 0.7 ppm * 5 = 3.5 ppm = 1/32 tsp of KH2PO4

Please let me know if this math is correct!

This is a simple example of what to do to convert dry ferts in solutions ferts