Why are leaves curling - The Planted Tank Forum
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post #1 of 20 (permalink) Old 01-22-2019, 09:59 PM Thread Starter
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Why are leaves curling

The leaves of my anubias and crypts are curling at the tips. I have co2 with evident pearling, I dose nilo g thrive 3 times a week, I do 25% water changes weekly, I have a finnex 24/7 light. The tank is 29 gallons.
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post #2 of 20 (permalink) Old 01-22-2019, 11:18 PM
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Hi @Animalisterra,

Welcome to TPT!

There are a few different reasons leaves curl at the tips, a picture and some water parameters would help us diagnose the issue. Just provide whatever information you can.

pH -

dKH -

dGH -

nitrates (PPM of NO3) -

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post #3 of 20 (permalink) Old 01-22-2019, 11:35 PM Thread Starter
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Ph- 7.2
Kh-180
Gh- 30
Nitrate- between 0 and .5
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post #4 of 20 (permalink) Old 01-23-2019, 02:09 AM
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Originally Posted by Animalisterra View Post
Ph- 7.2
Kh-180
Gh- 30
Nitrate- between 0 and .5
Hi @Animalisterra,

Is the KH 180 ppm? (about 10 dKH)

Is the hardness 30 dGH?

If so that is some hard water!

Can you possibly post a picture?

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post #5 of 20 (permalink) Old 01-23-2019, 02:54 AM Thread Starter
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Yes, we do have very hard water. The numbers I gave were in ppm. This is the curling leaves of the crypt. Everything else seems very healthy. The leaves just curl. My giant hygros leaves also come out a bit deformed
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post #6 of 20 (permalink) Old 01-23-2019, 03:46 AM
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Quote:
Ph- 7.2
Kh-180
Gh- 30
Nitrate- between 0 and .5
What tests was used to measure this. some test measure in parts per million while other use degrees (about 17.8ppm). Also are you adding any potassium bicarbonate or sodium bicarbonate to your water? Also what are your reedings from your tap water or whatever water source you are using with nothing added to it.
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post #7 of 20 (permalink) Old 01-23-2019, 04:36 AM
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Hi @Animalisterra,

You really need to get your nitrates up, I try to target my dosing to achieve a 20 ppm - 30 ppm nitrate level.

As for what is causing the curling leaf margins I suspect the issue to be magnesium (Mg) based upon the curling under and puckering of the leaf margins. You may have hard water however usually hard water is caused mostly by calcium sometimes with little to no magnesium.


Here is what I suggest:

1) Continue dosing your current nutrients as you have been; continue your water changes as you have been; continue the photoperiod and light intensity as you have been.

2) Go to your local drug store or sometimes even grocery store and pick up a box or bag or Epsom Salt (magnesium sulfate / MgSO4*7H2O). Get the cheapest stuff on the shelf with no additives, perfumes, scents, etc.

3) Do an initial dose to your tank of 1/2 teaspoon per 10 gallons. Thereafter, when you do water changes, add 1/2 teaspoon per 10 gallons of new water added.

Now the hard part...............................wait. Over the next two weeks watch the new leaves as they emerge. Do not watch any existing leaves, they will not change and may actually continue to decline. Are the new leaves larger, greener, straighter, healthier looking? You may also notice the growth rate of your plants increase. If the leaves improve then you are on the right path. If they improve but some of the curling continues we may have to increase the dosing. Keep us posted as things progress! -Roy

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post #8 of 20 (permalink) Old 01-23-2019, 12:29 PM Thread Starter
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Thank you so much! I will definitely do this! How can I increase my nitrates. Should I just dose my ferts more often? Also, the crinkled leaf edges are part of the plant, wentii bronze. The curling of the tip is what the issue was.
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post #9 of 20 (permalink) Old 01-23-2019, 02:49 PM
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Thank you so much! I will definitely do this! How can I increase my nitrates. Should I just dose my ferts more often? Also, the crinkled leaf edges are part of the plant, wentii bronze. The curling of the tip is what the issue was.
Hi @Animalisterra,

Yes, the 'rippled' edge of the C. wendtii is normal however the leaves should be 'flat'. If you look at the older leaves in your picture the leaves are 'bowed' (edges margins curled downward along the longitudinal axis) which would indicate a lack of magnesium. What are you dosing for your macro and micro nutrients?
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post #10 of 20 (permalink) Old 01-23-2019, 08:15 PM
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Quote:
Ph- 7.2
Kh-180
Gh- 30
Nitrate- between 0 and .5
Quote:
Yes, we do have very hard water. The numbers I gave were in ppm.
Your GH and KH readings don't make sense. 180ppm of KH is equivalent to 17.8 degrees GH (assuming all the KH is from calcium or magnesium). However 30 degrees GH is equal to 534ppm.

IS the GH in ppm or degrees? Also do you have a home water softener? If you GH is in ppm you have very soft water if so you need to add calcium as well as magnesium. If you have a home water softener it will remove calcium and magnesium from your tap water and replace it with sodium or potassium bicarbonate which Which keep your KH while lowering your GH.

So if you have a GH of 30ppm you should increase your water harness by 2 or 3 degrees to increase your calcium and magnesium levels. Seachem Equilibrium is a good product to do this. IF your GH is in degrees then it is likely you are magnesium deficient but calcium rich and adding Epsom salt should be added to the aquarium.
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post #11 of 20 (permalink) Old 01-23-2019, 10:54 PM Thread Starter
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Quote:
Originally Posted by Seattle_Aquarist View Post
Quote:
Originally Posted by Animalisterra View Post
Thank you so much! I will definitely do this! How can I increase my nitrates. Should I just dose my ferts more often? Also, the crinkled leaf edges are part of the plant, wentii bronze. The curling of the tip is what the issue was.
Hi @Animalisterra,

Yes, the 'rippled' edge of the C. wendtii is normal however the leaves should be 'flat'. If you look at the older leaves in your picture the leaves are 'bowed' (edges margins curled downward along the longitudinal axis) which would indicate a lack of magnesium. What are you dosing for your macro and micro nutrients?
I am just dosing nilo g thrive. It’s an all purpose fertilizer. So using epsom salt will help fix this?
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post #12 of 20 (permalink) Old 01-23-2019, 10:58 PM Thread Starter
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Quote:
Originally Posted by Surf View Post
Quote:
Ph- 7.2
Kh-180
Gh- 30
Nitrate- between 0 and .5
Quote:
Yes, we do have very hard water. The numbers I gave were in ppm.
Your GH and KH readings don't make sense. 180ppm of KH is equivalent to 17.8 degrees GH (assuming all the KH is from calcium or magnesium). However 30 degrees GH is equal to 534ppm.

IS the GH in ppm or degrees? Also do you have a home water softener? If you GH is in ppm you have very soft water if so you need to add calcium as well as magnesium. If you have a home water softener it will remove calcium and magnesium from your tap water and replace it with sodium or potassium bicarbonate which Which keep your KH while lowering your GH.

So if you have a GH of 30ppm you should increase your water harness by 2 or 3 degrees to increase your calcium and magnesium levels. Seachem Equilibrium is a good product to do this. IF your GH is in degrees then it is likely you are magnesium deficient but calcium rich and adding Epsom salt should be added to the aquarium.
The gh is 30ppm and we do have a water softener. I have looked at seachem equilibrium and have heard good things about it. Will doing epson salt dosing and seachem equilibrium be ok Or should I only use one
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post #13 of 20 (permalink) Old 01-24-2019, 12:49 AM
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I am just dosing nilo g thrive. Itís an all purpose fertilizer. So using epsom salt will help fix this?
Hi @Animalisterra,

Yes, assuming that magnesium is the nutrient that is lacking. Remember existing leaves will not improve, watch the new leaves as they emerge for improvement.

-Roy

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post #14 of 20 (permalink) Old 01-24-2019, 01:19 AM Thread Starter
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Thank you all for all your help but I am hearing two different answers. One to use epson salt and another to use seachem equilibrium. Both the gh and kh I mentioned are in ppm and I do have a water softener.
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post #15 of 20 (permalink) Old 01-24-2019, 01:20 AM
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The gh is 30ppm and we do have a water softener. I have looked at seachem equilibrium and have heard good things about it. Will doing epson salt dosing and seachem equilibrium be ok Or should I only use one
Seachem Equilibrium has Epsom salt in it (Magnesium sulfate), It also has Calcium sulfate (Gypum) and Potasium sulfate. Equilibrium will supplly all the calcium, magnesium, potassium, and sulfur your plants need. So just use the Equilibrium with your Thrive.
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