Nutrient Deficiency or Co2 Deficiency - The Planted Tank Forum
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post #1 of 7 (permalink) Old 05-03-2013, 11:14 PM Thread Starter
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Location: Iowa
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Nutrient Deficiency or Co2 Deficiency

Hey guys,

I'm having trouble with a certain species in my 30 gallon planted tank. I'm getting holes in the older leaves, and they're turning slightly yellow.

I'm running EI dosing:
1/4 tsp KNO3, 1/16 tsp KH2PO4, 1/16 tsp K2SO4 3x a week
1/16 tsp CSM+B three times a week.

Now, I know that pinholes might be a sign of potassium deficiency, but I'm also dosing a ton of K, so that shouldn't be the limiting nutrient.

I get my dropchecker to lime-green yellow by the end of my photoperiod. Could my plants be not getting enough CO2?
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post #2 of 7 (permalink) Old 05-04-2013, 12:44 AM
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Location: Southern California
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Seem like not a nutrient deficiency if you are dosing normal EI. EI should be more than enough + 50%WC/week. If you are dosing potassium-K dry without mixing, when it sink down and touches any leaves it can cause burned pinhole & melts. Old damaged leaf cannot be repairable, trim & discard.

Also, I use to have amano shrimps picking algae or what-not on my hydrocotyle tripartite and causes pinholes & tears.
Culprit might be the big guy in the picture. Keep an eye on this dude.
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post #3 of 7 (permalink) Old 05-04-2013, 01:53 AM Thread Starter
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Originally Posted by .KeepItShrimple View Post
Culprit might be the big guy in the picture. Keep an eye on this dude.
Uh oh. There are several big guys in this tank.
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post #4 of 7 (permalink) Old 05-04-2013, 03:23 AM
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Re: Nutrient Deficiency or Co2 Deficiency

I've never seen my Amanos damage my plants but I could certainly imagine them eating the decaying leaf matter around the circumference of the hole.

My first planted tank: The Wooden Buddha Mess
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post #5 of 7 (permalink) Old 05-04-2013, 06:38 AM
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Join Date: Oct 2011
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Hey xiaoxiy-
From my experience this looks like a CO2 deficiency. Usually lower leaves begin begin to show signs first by developing holes or transparent spots. Best bet is to dial in the CO2, then figure out if or what nutrients are lacking
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post #6 of 7 (permalink) Old 05-04-2013, 01:21 PM
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Location: Chattanooga, TN
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when dosing EI
its very hard to have a nutrient deficiency.. i'd guess co2 at first sign

i did however recently solve my dilema. at 180 PAR 6 inches from water surface, plants were starting to grow slowly after a few weeks in the tank but had otherwise shot up once they got that close to the surface.. and had shown no signs of co2 defiency. i raised co2 to no affect. well for fun because HAPPI at one point had a calcium/ magnesium def, i dosed 3 times the normal GH booster. 2 days later my plants were rockets again

so its possible to have nutrient deficiency, but with EI you need to have tons of growth to get there

i also did notice some of the newer leaves are slightly yellow on some edges. some are slightly twisted. the rotala looks a little weak. i'd up some co2 and wait 2 weeks to see how things change
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post #7 of 7 (permalink) Old 05-04-2013, 01:28 PM Thread Starter
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Alrighty. Upping Co2 it is! I'll keep a watchful eye on the fauna and see how they respond.
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