Anubais

steve todd

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Dec 15, 2017
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good morning

I have a 670lt low light setup using pressurized c02
I have only anubais on driftwood and some java fern
Had these plants over a month now none of them show any new growth
Some of the leaves are yellow. Fish are all discus

C02. 15-20ppm Using the Rotala. C02 calculator
I dose
NO3. 20ml 2x weekly
K2P04. 20ml 2x weekly
Aquagreen’s amgrow 20ml 2x weekly
50% waterchange weekly
Lights on for 6 hrs
4kh
C02 Controlled using a PH controller
Why isn’t there any sign of new growth
 
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Allwissend

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Hi. It looks like all the things are there. I am a little unclear by what you mean by 20ml NO3 and PO4. It would be more informative to provide the actual mg/l or ppm. You can use a calculator like rotalabutterfly.com to figure it out.

It could be that there is simply too little light. These plants also take their time adapting to new conditions. Are old leaves yellow or new ones ?
 

steve todd

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7.5ppm kno3 2x weekly
0.2ppm Aquagreen’s amgrow 2x weekly
1.3ppm kh2p04 2x weekly
Old leaves yellow
 
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Allwissend

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Interesting. I would not think that with 15ppm NO3 per week and a discus tank the Anubias would run out of N. However, old yellow leaves are usually associated with N deficiency. Maybe CO2 needs to be increased as well, hower Anubias is not a CO2 demanding plant.

What about GH ? Do you dose any Mg ?
 

tiger15

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One month may not be not enough to see growth, even if you’ve done everything right. New plants need transition to your tank environment. If your plants were emerged grown, it will take even more time and some leaves may even die off before replacing with water leaves.
 

Allwissend

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4dkh of GH. Don’t dose MG
What should I increaseC02 to ATM between 15-20ppm
Cheers
Thank you for your answer steve todd. Just to be on the safe size I would start by dosing a little Mg say 4mg/L (ppm) once per week after water change. You can get Mg from Epsom salt (MgSO4*7H2O) and use the rotala calculator to figure out how much you need to add. Mg deficiency will cause yellow/ white patches on old leaves

What is the pH set in the pH controller and what is the pH of degassed water ? A 1 pH drop should be enough.

Anubias are slow metabolism plants, even in optimal conditions they will grow slowly and take their time.
 

steve todd

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PH on controller set at 6.8 not sure on what u mean by degassed water using the Rotala calculator I have C02 of 15-20ppm,I’m trying to use Rotala calculator to get a solution of MG but watever. numbers I use it doesn’t change from 5ppm using the lowligh\weekly
 
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Allwissend

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The calculator seems to be working fine for me, see attached.

Degassing water refers to letting the aquarium water to sit in a clean sterile vessel until it reaches equilibrium with the atmosphere (~24h). More here http://www.plantedtank.net/forums/8...ussion/845378-measuring-co2-degas-method.html and other threads here.

rotalabutterfly.JPG
 

Allwissend

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Yes, it is pretty soluble in water, just select large dose volume and you should be safe. The solubility is above 100g/100mL for the MgSO4*7H2O (Epson salt) form