In this blog, I will be explaining how to properly prepare your GP One Part Kit nutrient solution.
Before we begin, make sure you have an appropriately sized reservoir for your solution, a measuring utensil (i.e. measuring cup or syringe), an air pump with an air stone and airline and pH up and down solutions.
The first thing we want to do is fill our reservoir with the appropriate amount of water. Water that has been filtered to remove any contaminants is preferred as it allows us to only give the plants the elements we desire.
Once you have enough water in the reservoir to feed all of your plants make sure you add the air stone.
If this is your first time using an air stone and air pump, then begin by attaching the air stone to the air pump by using the airline. Make sure you have enough length of airline to comfortably place the air stone in the reservoir and have the air pump close enough to an electrical outlet.
Place the air stone in the water and plug the air pump into the electrical outlet. You should start seeing air bubbles form in the water. You are now ready to mix.
The GP One Part kit comes with Medi One as its base nutrient and we will be adding this first. (Below Image)
Medi One is designed to be increased in strength as the plant ages into maturity. For this demonstration, we will be preparing a nutrient solution for a plant in week 3 of its flowering stage.
Medi One calls for 2ml per liter during week 3. We have 1 gallon of water in our reservoir so we will be adding 8ml of Medi One to our water. Use your measuring cup or syringe to remove 8ml from the bottle and add it to the reservoir. Use the measuring cup or something similar to stir the solution until the Medi One has become completely diluted in the water.
We will continue the same process for the Ocean Magic, Rezin, Massive and Liquid Weight. Follow the One Part Kit feeding chart.
Adjusting the pH
Once all the nutrients have been mixed we need to adjust the pH for optimal uptake. A pH range of 6.0 to 6.4 is ideal for growers in peat moss or coco, while a pH of 5.8 to 6.2 is ideal for soilless mediums.
The first thing you want to do is check the pH of the nutrient solution you have just mixed. It will likely be sitting between a pH of 4 and 5. Because our plants are in peat moss and we want our pH to be around 6.0 and 6.4 and will need to use pH up to accomplish this.
When adjusting pH, it is good to know the strength of your acids and bases. Not all are made equal and some are very concentrated. When pH is being adjusted, we don’t want to run the risk of adding too much pH up or down.
The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value. For example, a pH of 4 is ten times more acidic than a pH of 5 and 100 times (10 times 10) more acidic than a pH of 6.
What this means is that if you are using pH up to adjust your pH to 6.4 but add too much and end up with a pH of 7.4 you will need 10 times more pH down to get the desired result. We suggest not doing this and instead starting all over. This is why it is important to adjust your pH carefully.
For smaller reservoirs I highly recommend using less concentrated acids and bases. This will help reduce the risk of over adjusting your pH and having to throw away the nutrient solution.
Start by adding 250ml of water to a measuring cup. Now add about 30ml of pH up. Stir the contents well.
Begin adjusting your pH by pouring about 10ml of the solution into the reservoir. Mix the solution well and use your pH pen to check the pH. Allow the pen to sit in the solution for a few minutes to get an accurate reading. If the pH is still too low, continue the process. If it is between the desired range of 6.0 to 6.4 you have successfully adjusted your pH and can begin feeding your plants.
Once you have fed all of your plants, any leftover solution should be discarded. Knowing how much solution your plants can take during a feed will help reduce any waste.