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Mixing fertilizer for the first time. Couple different sites suggest little different regiments. Pretty sure I got this right but for my own piece of mind need to double check to avoid possible disaster
RO water-250 ml
KNO3-5tbs
KH2PO4-0.5tsp
K2SO4-4tbs
30ml of above solution should raise the level in a 50 gal of water to:
KNO3-20ppm
KH2PO4-1.2ppm
K2SO4-20ppm
I assume I can mix all of these in one container and fertelize three times a week(M,W,F). T,Th-CSM+B. Sunday-50% water change


Also,
Potassium Nitrate means Potassium in Potassium Nitrate or Nitrate in Potassium Nitrate
Thanks
 

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Tom Barr recommends the following:

40-60 Gallon Aquariums
+/- 1/2 tsp KN03 3x a week
+/- 1/8 tsp KH2P04 3x a week
+/- 3/4 tsp GH booster once a week(water change only)
+/- 1/8 (10ml) Trace Elements 3x a week
50% weekly water change

In your example, your measurements are very off.

RO water: 250 mL
Each dose is 30 mL

This means you have ~8.33 doses per 250 mL.

Thus, according to Tom Barr, you would need 8.33 * 1/2 teaspoon of KNO3 = 4.165 teaspoons.

You have 5 tablespoons down = 15 teaspoons! That's almost 3 times as much as you need!

Similar calculations can be made for the other chemicals.

You can mix all of these chemicals into one container and fertilize it three times a week. Tuesday, Thursday and Saturday you should add the CSM+B (you seemed to forget Saturday).

Potassium Nitrate means Potassium in Potassium Nitrate or Nitrate in Potassium Nitrate
Not too sure what you mean here. Potassium nitrate adds both potassium and nitrates to your water column.
 
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