Rotala stunted growth--deficiency? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 06-18-2020, 04:38 AM Thread Starter
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Rotala stunted growth--deficiency?

Hi guys,

While I'm seeing slower than expected growth in my tank overall the plants forming atleast appear healthy. My main concern is my rotala colorata which gets lots of stunted tips. The new leaves appear smaller than usual and the edges of the new leaves are often black and sometimes malformed.

I'm dosing thrive 3x per week and I've been going off of nitrate readings to determine if it appears I need to increase dosing. So far with my dosing 3x per week, my nitrate readings tend to increase throughout the week from 5ppm to 25ppm. I know fish contribute as well but it's the best test I can do to correlate to plant growth.

Does this description of the deficiency raise any concerns perhaps with micro nutrients? Should I increase my dosage of thrive? Or maybe dose extra micros separately? I'll add a picture. There are some tips that exhibit this behavior.
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post #2 of 5 (permalink) Old 06-18-2020, 04:49 AM
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The bottoms look pretty green, have you had the whole stem color up or just the tips?
what type of lighting do you have? pressurized CO2?

what size tank do you have? weekly water changes?

I think the plant looks normal for the lower light conditions it is under. Not a deficiency in nutrients but of light and CO2

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post #3 of 5 (permalink) Old 06-18-2020, 06:06 AM Thread Starter
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Quote:
Originally Posted by monkeyruler90 View Post
The bottoms look pretty green, have you had the whole stem color up or just the tips?
what type of lighting do you have? pressurized CO2?

what size tank do you have? weekly water changes?

I think the plant looks normal for the lower light conditions it is under. Not a deficiency in nutrients but of light and CO2
So far only the tips will color up 😕

Running a nicrew deluxe which apparently based on par ratings is considered high light. It does appear to be a very bright light but I'm not sure.

I use diy co2 but regularly keep co2 levels above 30ppm based on the drop checker.

I've always battled alage using this light even with co2 so I assumed that meant it was considered a high light setup.

The tank is a standard 10 gallon. I follow EI dosing with the thrive and do a weekly 50% water change.

If you think this is based on light deficiency, can you recommend an LED that would provide adequate light for this plant?
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post #4 of 5 (permalink) Old 06-30-2020, 07:07 PM
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it might be good to try a second nicrew fixture and see how the plants do under the lights

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post #5 of 5 (permalink) Old 07-01-2020, 08:57 AM
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Excess rather than too little. Which is a problem for many folks on this forum - Most rotala rotundifolia variants do much better with leaner water column dosing, richer substrate feeding. Better coloration, cleaner forms.

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