Holes in older leaves. EI Dosing - Page 3 - Plant Deficiencies - Aquatic Plant Central

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Old 04-04-2018, 08:08 AM   #21 (permalink)
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Default Re: Holes in older leaves. EI Dosing

The beard algae was from the previous tank before I started dosing EI method. The drop checker I have is a Fluval one and I use the Fluval drop checker fluid. It stays light green. According to Zorfoxs PTC with a PH of 6.86 and a KH of 3 will be around 12.46ppm. I understand this is way too low, I will adjust my drop checker when I go home for lunch. I thought I had quite a bit of CO2, I guess I was wrong... I have not seen the beard algae spread as of yet.
So your saying if I had enough co2, say around 30ppm, the beard algae should be dead by now?
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Old 04-04-2018, 10:41 AM   #22 (permalink)
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Default Re: Holes in older leaves. EI Dosing

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Originally Posted by Arkaeus View Post
The beard algae was from the previous tank before I started dosing EI method. The drop checker I have is a Fluval one and I use the Fluval drop checker fluid. It stays light green. According to Zorfoxs PTC with a PH of 6.86 and a KH of 3 will be around 12.46ppm. I understand this is way too low, I will adjust my drop checker when I go home for lunch. I thought I had quite a bit of CO2, I guess I was wrong... I have not seen the beard algae spread as of yet.
So your saying if I had enough co2, say around 30ppm, the beard algae should be dead by now?
Raising the amount of CO2 isn't likely to cause the BBA to die (in my experience). But, if you don't already have a lot of BBA in the tank, having more CO2 can cause the plants to be healthier, and that inhibits BBA.

I have had problems trying to use the solutions that come with a drop checker, so I always make my own, using distilled water and baking soda. It is pretty easy to do. I think it is likely that most of the companies selling drop checkers don't understand how they work, so their 4 dKH solutions can be completely wrong. (Again, based on my experience.)

A way to check your CO2 concentration is: First, take a cupful of water from the tank. Let it sit in the open air for 24 hours or so. Measure the pH of that water. Now measure the pH of the tank water when the CO2 has been on for several hours. The drop in pH from what it was for the cup of water will tell you about how much CO2 is in the tank water. The ppm of CO2 is 3 time 10 raised to the difference in pH power. So, if the cup of water had a pH of 7.2, and the tank water had a pH of 6.4, the difference is .8, so the ppm of CO2 is about 3 x 10 to the .8 power, or 3 times 6.3 or 19 ppm.
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Old 04-05-2018, 06:00 AM   #23 (permalink)
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Default Re: Holes in older leaves. EI Dosing

Thanks for the info. How do I make the drop checker solution you are talking about? Mixture ratio?
As I said, I increased Co2 Drop rate and we can see in the pic below the PH6.61 (green) indeed dropped from around 6.9. I also know the temperature 74F (yellow) which was 77F affected this also.
So according to Zorfox my co2 levels should be closer to 22.16ppm with a KH of 3. I actually believe my KH is closer to 3.5/4 which would bring co2 closer to 26ppm

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Old 04-05-2018, 12:01 PM   #24 (permalink)
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Default Re: Holes in older leaves. EI Dosing

To make your own known KH water for a drop checker:
1. Start with 6 cups of distilled water in a clean measuring container
2. Add 1/8 teaspoon Sodium Bicarbonate (baking soda, freshly opened) to the 6 cups of water and mix
3. Pour out 3 cups of this mix and discard
4. Add back 3 cups of distilled water and mix
5. Pour out 3 cups of this mix and discard
6. Add back 3 cups of distilled water and mix
7. Pour out 1 cup of this mix and discard
8. Add back 1 cup of distilled water and mix
7. Water comes out to a 4 dKH solution
8. To make a 2 dKH solution, mix one cup of the 4 dKH solution with one cup of distilled water.
9. To make a 1 dKH solution, mix one cup of the 2 dKH solution with one cup of distilled water.

You can't accurately measure the CO2 in a planted aquarium by measuring pH and KH. The equation that relates ppm of CO2 to pH and KH works only for pure water, that contains nothing that affects pH or KH except CO2 and carbonates/bicarbonates. Aquarium water almost always has other dissolved stuff that affect the pH and KH.
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Old 04-09-2018, 06:21 AM   #25 (permalink)
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Default Re: Holes in older leaves. EI Dosing

Thanks, hoppy, I will have to try it out. How long does the solution stay good for? Guessing if not airtight the water would evaporate and then change the solution.

I got back from out of town this weekend and have a few more pics. I have done two water changes since we spoke last @ 50%. In each 5 gallon bucket I added 1-1/2 tbsp GHbooster and 1/4 tbs of baking soda. This comes out to 8GH and 4KH.

Tested the tank: [email protected] [email protected]/4

1/8 tsp CSM+B - M W F

All the below on T T Sun
1/2 tsp KNO3
1/8 tsp KH2PO4
1/8 tsp K2SO4

Pics from last night.




Also my Ludwigia repens, are losing a LOT of leaves at the bottom.


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Old 04-09-2018, 06:31 AM   #26 (permalink)
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Default Re: Holes in older leaves. EI Dosing

You do have to store a standard KH water solution in an air-tight bottle to avoid evaporation, so that limits how long you can store it. I am using bottled water bottles to store mine. If I had to guess I would say a year or two would be the longest you could store it and have any confidence that it was still reasonably accurate. (That reminds me I should make new solutions for myself too.)
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Old 04-09-2018, 02:59 PM   #27 (permalink)
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Default Re: Holes in older leaves. EI Dosing

You guys think I am going through a Nitrogen or Magnesium deficiency?
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Old 04-15-2018, 05:15 PM   #28 (permalink)
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Default Re: Holes in older leaves. EI Dosing

Are the older leaves detaching from the plant and or pinhole? If yes, then potassium issue.

If leaves disintegrate evenly then nitrogen.

If leaves start to turn yellow from the outside edge of the leaves and go inward then phosphate.

This is assuming there is a deficient and not an excess of other cations (Ca, Mg, Na, NH4, etc) reducing the uptake of Potassium.

What are you using for gH booster? Seachem Equilibrium? Ratio does play a role to some extent with nutrient uptake. Excess of nutrients are interchangeable to cause other nutrient uptake being reduce. i.e. 6 calcium to 1 mag can cause a magnesium deficiency depending on pH and temperature.

Keep using 1/8 tsp K2SO4
If you are not using seachem equilibrium then lower gH to 3 to 5 first to see if that correct the problem.
If you are using seachem equilibrium then lower gH to 3 to 5. Start at 3 gH. If you see calcium deficiency, increase to 4 gH and go up by 1 gH till the calcium deficiency is corrected.
If you still see holes in leaves and there is no calcium deficiency, then go up to 1/4 tsp K2SO4.

Excess potassium relative to calcium can cause calcium deficiency symptoms even when there is calcium in the water.

The idea is to see if there is excess of Ca and Mg causing K uptake to be reduce or if K is bottoming out. Not sure if this make sense.

Last edited by EDGE; 04-15-2018 at 07:33 PM..
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