Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
Ok, thank you! 2,5ppm of mgso4? Can i add this?
-
You are viewing the forum as a Guest, please login (you can use your Facebook, Twitter, Google or Microsoft account to login) or register using this link: Log in or Sign Up
Recommended ppm??
- Thread starter LondonDragon
- Start date
Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
This is co2 dificiency?
Christos Ioannou
Member
As this tread already talks about ppm, here is my question:
I have been getting pinhole sized holes on alternanthera reineckii and staurogyne repens (in a lesser extend). Collected feedback suggests this relates to K deficiency.
I am following http://calc.petalphile.com/ to create my macro solution.
Macro solution is KNO3 and KH2PO4 in 500ml of water; dosing about 50ml three times a week.
Dosing regime
Micros: Mon, Wed, Fri
Macros: Tue, Thu, Sat
Below are screenshots of the calculations:
KNO3
KH2PO4
Macro dosing three times a week. This will yield
NO3: 7.50 X 3 = 22.5 ppm weekly dosing
PO4: 1.3 X 3 = 3.9 ppm weekly dosing
K: (4.73 + 0.54) x 3 = 15.81 ppm weekly dosing
According to EI the target ppm values are
Nitrate (NO3): 20ppm per week (22.5 ppm per week in above calculations, OK)
Phosphate (PO4): 3ppm per week (3.9 ppm per week in above calculations, OK)
Potassium (K): 30ppm per week (15.81 ppm in above calculation, almost 50% off!)
1. Am I doing something wrong in my calculations?
2. Is there another salt I could add in this equation to raise the K ppm to the expected value?
3. Do these calculations explain the K deficiency and the effect it has on my plants?
Thank you
I have been getting pinhole sized holes on alternanthera reineckii and staurogyne repens (in a lesser extend). Collected feedback suggests this relates to K deficiency.
I am following http://calc.petalphile.com/ to create my macro solution.
Macro solution is KNO3 and KH2PO4 in 500ml of water; dosing about 50ml three times a week.
Dosing regime
Micros: Mon, Wed, Fri
Macros: Tue, Thu, Sat
Below are screenshots of the calculations:
KNO3
KH2PO4
Macro dosing three times a week. This will yield
NO3: 7.50 X 3 = 22.5 ppm weekly dosing
PO4: 1.3 X 3 = 3.9 ppm weekly dosing
K: (4.73 + 0.54) x 3 = 15.81 ppm weekly dosing
According to EI the target ppm values are
Nitrate (NO3): 20ppm per week (22.5 ppm per week in above calculations, OK)
Phosphate (PO4): 3ppm per week (3.9 ppm per week in above calculations, OK)
Potassium (K): 30ppm per week (15.81 ppm in above calculation, almost 50% off!)
1. Am I doing something wrong in my calculations?
2. Is there another salt I could add in this equation to raise the K ppm to the expected value?
3. Do these calculations explain the K deficiency and the effect it has on my plants?
Thank you
Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
What is your light watts?
What substrate do you use?
What substrate do you use?
Christos Ioannou
Member
Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
What tipe of substrate?
Yes, add however much you want.
Collective feedback is wrong. Fix your CO2 and stop wasting time worrying about K.
I cannot see the problem from this photograph. Please describe the fault.
Cheers,
Christos Ioannou
Member
Its cat litter. The one below.
Ok. Will revisit my CO2. Still, how about the 15ppm/week compared to 30ppm suggested for K? How does that reflect on plant healthiness?
Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
Ok.. I use akadama. Akadama absorvs nutrients. At least when is new.. This absorvs to...so i think that uou have this problem.
Diogo Reis
Member
- Joined
- 15 Jun 2013
- Messages
- 55
CO2.
No problem. 15ppm is fine, so is 30ppm, so is 130ppm.
As I mentioned many times, if you are dosing and still incur nutrient deficiency then you need to look at your flow/distribution. Just be certain that there is in fact a nutrient deficiency and not a CO2 deficiency.
Cheers,