The correct mixture of water and SNAP Nutrient Solution for Hydroponics A and B is called the working solution. This diluted mixture contains all the nutrients a plant needs in order to grow. The working solution also regulates its own pH making sure it is in the proper range for optimal nutrient uptake.
How to Prepare the SNAP Working Solution
Start with ten liters (10L) of clean water. Water from regular sources, tap water, well water, etc., works well. The use of pure rain water and pure distilled (reverse osmosis) water is discouraged because pure rain water and pure distilled water has a neutral pH. Sometimes they are even slightly acidic due to the presence of dissolved carbon dioxide gas.
SNAP is designed for regular water sources which in the Philippines are often slightly alkaline. If the working solution is prepared from water with neutral to slightly acidic pH the resulting working solution will be ineffective because the resulting solution will have a pH level that is way below the optimal range. Please see this video that demonstrates the effect of water quality to the pH of the resulting working solution for more information.
Add 25mL of SNAP A. Mix well. Add 25mL of SNAP B. Mix well. Please note the emphasis on mixing well after adding SNAP A and SNAP B. Either SNAP A or SNAP B can go into the mixture first but do not add both at the same time nor mix SNAP A and SNAP B together before adding them in water. This is because the components of SNAP A and SNAP B will react with each other and will render the resulting solution useless. This is also the reason why SNAP A and SNAP B are in separate bottles.
When properly mixed the resulting working solution has a slightly yellow and cloudy appearance.
Different volumes of working solution can be prepared by mixing SNAP A/B and water in a 2.5mL per L ratio, i.e, 2.5mL of SNAP A and 2.5mL of SNAP B for every liter of water.
To prepare one (1) liter of working solution half a teaspoon may be used because one teaspoon is equivalent to 2.46mL.
SNAP nutrient solution sets from authorized resellers usually comes with measuring cups. To use them fill up the cup with nutrient solution up to the level indicated in the picture below.
White and powdery precipitates may appear in the working solution just after mixing or after a few days or weeks after transplanting seedlings onto the working solution. This is normal, it is not harmful and in will not effect the growth of the plants.
For larger applications, the use of a large 200L drum is recommended. A drum with a 200L capacity can be used to prepare a 201L working solution by simply mixing 500mL of SNAP A (the whole bottle) and 500mL of SNAP B (again, the whole bottle). This 200L working solution is enough for 20 styrofoam boxes which can grow a total of 160 heads of lettuce or other leafy vegetables.
That’s it! If you have any questions please feel free to leave a comment below. Good luck and happy growing!