K2SO4 (potassium) question
Hello, I have an established 10 gallon low-tech tank that has been up for approximately six months, which I have just begun dosing with ferts and Excel.
I have a bottle of Seachem liquid potassium. If I do the math, the verbiage on the Seachem bottle tells me that 1.67 mL of this product will raise the K2SO4 level in 10 gallons of water by 3.33 ppm. My research reveals that the suggested ppm level of K2SO4 for a CO2 enriched aquarium should be between 10-20ppm, (10ppm for a tank without CO2, which I mention just for reference). The verbiage on the Seachem bottle recommends dosing K2SO4 two to three times a week.
The questions I have are: (the short of it is how do you do it?)
1. If my water should maintain a K2SO4 level between 10-20ppm, and the recommended dose is 1.67 mL, which will raise the level by 3.33ppm, how fast should I bring the water up to that level?
2. How can I safely do that without hurting the plants (real world)?
3. How do I calculate for consumption?
I feel that dosing K2SO4 is more challenging due to the fact that there are no freshwater tests available for determining K2SO4 levels.
Note: I am using RO water that I buffer and control GH. I mention that because water changes alone will not add any K2SO4 to my aquarium.
Noteworthy: (from my research):
Benefits: Potassium helps regulate plant metabolism and affects water pressure regulation inside and outside of plant cells. It is important for good root development. Potassium treats for leaves yellowing, browning, pinholes, weak stems & roots.
Deficiency Symptoms: Brown scorching and curling of leaf tips as well as chlorosis (yellowing) between leaf veins. Purple spots may also appear on the leaf undersides. Plant growth and root development are usually reduced.
Notes: There is no level at which potassium becomes toxic to plants. But when plants get too much potassium, the absorption of other nutrients is inhibited, which leads to the symptoms caused by the deficiency of those nutrients. (That is a biggie!) It means that if you overdose potassium, you may think that apparent deficiencies with your plants are being caused by not dosing enough of the other ferts. Where in reality the problem is that you are overdosing potassium! Wow, I'm glad that I looked that up!
Ok, thank you for reading. Much appreciated.
Last edited by Chip Munk; 11-17-2016 at 09:49 AM.
Reason: Add question