Using the concepts presented at
"EC, PH & Water Levels for Hydroponic Systems What they tell you and how to react", for each growth stage, you select the amount of nutrients to mix together for the target EC based on the number of gallons of water needed.
Example: If doing a 10 gallon reservoir change at the Early Vegetation Stage with a target EC of 0.6 (300ppm):
1. Fill a 5 gallon bucket with 4 gallons of water.
Please note that baseline EC of City/Well water affects measured EC value in step 3. If EC of City/Well water is greater than 0.3 (150ppm) then, either use distilled or Reverse Osmosis (RO) water.
2. From the Early Vegetative Chart, go to the 4 gallon section, 0.6 (300ppm) row for the amount of each nutrient to mix in with 4 gallons of water.
3. Verify EC level of mix. Adjust if necessary.
4. Adjust PH of nutrient solution in bucket to 5.8.
5. Pour into reservoir.
6. Repeat steps 1 through 5 a second time for a total of 8 gallons.
7. From the Early Vegetative Chart, go to the 2 gallon section, 0.6 (300ppm) row for the amount of each nutrient to mix in with 2 gallons of water.
8. Pour into reservoir for a total of 10 gallons of nutrient water.
10. Verify reservoir EC and PH and adjust if necessary.
Note: It is easier to lower the reservoir water EC by replacing a gallon or so of reservoir water with a gallon of plain PH corrected City/Well/Distilled/RO water then it is to increase reservoir water EC by replacing a gallon of reservoir water with a gallon of stronger nutrient water (eg: 0.7ec (350ppm)).
Germination / Seedling Stage (5 to 10 Days)
Typical Range: 0.4 (200 ppm) to 0.6 (300 ppm)
Mixture maybe a little hot (~0.1ec[50ppm]). Dilute as necessary |
|
| Gallons |
Target EC
(PPM Hanna
Scale) |
Cali-
Magic |
Flora
Micro |
Flora
Grow |
Flora
Bloom |
Hydro-
guard |
Beastie
Bloom |
|
| 1 |
0.4 (200ppm) |
0.0 |
0.9 |
0.9 |
0.9 |
0.0 |
0.0 |
|
0.5 (250ppm) |
0.0 |
1.2 |
1.2 |
1.2 |
0.0 |
0.0 |
|
0.6 (300ppm) |
0.0 |
1.5 |
1.5 |
1.5 |
0.0 |
0.0 |
|
0.7 (350ppm) |
0.0 |
1.8 |
1.8 |
1.8 |
0.0 |
0.0 |
|
| 2 |
0.4 (200ppm) |
0.0 |
1.8 |
1.8 |
1.8 |
0.0 |
0.0 |
|
0.5 (250ppm) |
0.0 |
2.4 |
2.4 |
2.4 |
0.0 |
0.0 |
|
0.6 (300ppm) |
0.0 |
3.0 |
3.0 |
3.0 |
0.0 |
0.0 |
|
0.7 (350ppm) |
0.0 |
3.6 |
3.6 |
3.6 |
0.0 |
0.0 |
|
| 3 |
0.4 (200ppm) |
0.0 |
2.7 |
2.7 |
2.7 |
0.0 |
0.0 |
|
0.5 (250ppm) |
0.0 |
3.6 |
3.6 |
3.6 |
0.0 |
0.0 |
|
0.6 (300ppm) |
0.0 |
4.5 |
4.5 |
4.5 |
0.0 |
0.0 |
|
0.7 (350ppm) |
0.0 |
5.4 |
5.4 |
5.4 |
0.0 |
0.0 |
|
| 4 |
0.4 (200ppm) |
0.0 |
3.6 |
3.6 |
3.6 |
0.0 |
0.0 |
|
0.5 (250ppm) |
0.0 |
4.8 |
4.8 |
4.8 |
0.0 |
0.0 |
|
0.6 (300ppm) |
0.0 |
6.0 |
6.0 |
6.0 |
0.0 |
0.0 |
|
0.7 (350ppm) |
0.0 |
7.2 |
7.2 |
7.2 |
0.0 |
0.0 |
|
Dave's feeding levels by stage of growth.
Originally Posted by Daveb22
Using the concepts presented at "EC, PH & Water Levels for Hydroponic Systems What they tell you and how to react", for each growth stage, you select the amount of nutrients to mix together for the target EC based on the number of gallons of water needed.
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