I mix solutions for all my ferts since my tanks are all nanos.
KNO3 = 38.8g in 250ml water (1ml = 2.5ppm N in 10gallon & 1.5ppm K in 10 gallon)
K2SO4 = 26.5g in 250ml water (1ml = 1.25ppm K in 10 gallon)
KH2PO4 = 3.4g in 250ml water (1ml = 0.25ppm P in 10 gallon)
CSM+B = 8.8g in 250ml water (1ml = 0.03ppm fe in 10 gallon)
M: 50-75% water change & 12ml K2SO4 (15ppm K)
M-W-F: 6ml KNO3, 6ml KH2PO4 (15ppm N, 9ppm K, 3ppm P)
T-H-Sa: 4ml CSM+B (0.12ppm fe)
Su: Nothing
I used to spread the K2SO4 dosing throughout the week, but I've found that it works better for me to dose it all at once right after the water change with just the KNO3 supplementing K through the rest of the week. I've also found that I've had to increase the P dosing in order to get rid of the GSA (green spot algae). I tweak the amounts as needed as I work towards my desired results.