Is this K deficiency? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 11-30-2011, 10:30 PM Thread Starter
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Is this K deficiency?

i was wondering if this is K deficiency. The hole start off as small clear spots on the leaves then get bigger, then eventually turn into a hole. Most of the "holes" are really clear spots in the picture.





I have a 15 gallon tank and am doing EI dosing 3x a week with, KNO3, K2SO4, K2PO4, and CSM+B
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post #2 of 7 (permalink) Old 11-30-2011, 10:39 PM
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Is that a Temple plant or Hygrophila corymbosa? If so, most likely K deficiency. I have half of the tank filled with them. I managed to reverse the deficiency by dosing extra potassium as my KNO3. I dose with EI and I add about 20ml of KNO3 and 20ml of K.
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post #3 of 7 (permalink) Old 11-30-2011, 10:53 PM Thread Starter
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it is sunset hygro. The thing is i would think that with all of the things that i am dosing KNO3,K2PO4,K2SO4. I would have enough K. At least i would assume that I would.
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post #4 of 7 (permalink) Old 11-30-2011, 11:10 PM
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Originally Posted by kilfrg7864 View Post
it is sunset hygro. The thing is i would think that with all of the things that i am dosing KNO3,K2PO4,K2SO4. I would have enough K. At least i would assume that I would.
How much KNO3 and K2SO4 are you adding, in ml? Assuming your are mixing 1/4 of tea spoon of dry fert to 250ml of water.
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post #5 of 7 (permalink) Old 11-30-2011, 11:36 PM Thread Starter
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Im dry dosing straight into the tank.

1/8 tsp KNO3
1/16 KH2PO4
1/16 K2SO4
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post #6 of 7 (permalink) Old 11-30-2011, 11:45 PM
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Quote:
Originally Posted by kilfrg7864 View Post
Im dry dosing straight into the tank.

1/8 tsp KNO3
1/16 KH2PO4
1/16 K2SO4
I would increase the K2SO4 to 1/8 tsp. Also, if light can't reach to the lower leaves, it tends to make the deficiency worst.
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post #7 of 7 (permalink) Old 04-30-2012, 03:43 PM
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increase the K2SO4 to 1/8 tsp.
I agree with that. I would also increase the KNO3 to .5 tsp.
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