Old anubias leaves turning yellow

[Puntius]

Hi everyone, my old anubias leaves are turning yellow. Im dosing ei a and got co2 pumping hard... Decent Flow around 19 times my tank volume of 250 liters.. Dosing about 35 ppm nitrates, 25 Potassium, 3 Phosphates 0.5 iron Plantex csm-b. What shortage is it.

Thanks

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[Puntius]

Anyone

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[Puntius]

Could it be shortage of nitrates, as older leaves are becoming yellow. I do dose 35ppm per week. Please advise. Thanks

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[Edvet]

Do you dose Mg?

 

[Puntius]

Only started dosing it about 2to 3 weeks ago 10ppm

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[Puntius]

Sorry only 8.7ppm Magnesium

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[Edvet]

dosing ei a and got co2 pumping hard... Decent Flow around 19 times my tank volume of 250 liters

Do you have a picture of your tank? Because there still could be a CO2 problem

 

[Puntius]

Do you have a picture of your tank? Because there still could be a CO2 problem

Doubt it might be co2 though

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[Edvet]

Any chance on something more discernible, kinda hart to see details.
Do you measure pH drop? When do you start with CO2?

 

[Puntius]

I start co2 2 hours before lights on... Still waiting for my ph pen. But my drop checker is lime green by lights on

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[Puntius]

My Ludwigia glandulosa going well

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[Daveslaney]

My guess would be it is getting to much light where it is now, Remove the yellowed leafs and move it to a more shaded place. See if it improves.
Anubias will struggle in high light situations.