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Discussion Starter · #1 ·
Obviously this plant is doing fine with new growth after a month of so of proper dosing PPM, but the lower leaves look pathetic to be nice. I would say anemic, but since the new growth looks good, I think iron is not the issue. Purchased as Ludwigia peruensis Diamond.

Just cannot break over .5ppm Phosphate. Nitrate 10ppm. CO2 calculated at 20ppm or so at 3bps. I began to dose K every few days with leftover Seachem at 10ml for a 90g with 20g sump, which is 2/3 of Seachem's recommendation, but stopped as I do not think potassium. I am thinking nitrate or phosphate? Dose excel at 15ml when the BBA starts to reappear.

Prior to PPS, I did put a few Flourish tabs in and around the area prior to planting. pH 6.2-6.6. gH 4 kH 2. Substrate mostly ecocomplete at that side of the tank.

Thanks in advance for taking the time to read this.
 

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Hi
From the picture, the lower leaves are noticeably smaller than the top leaves. This indicates changes to the water parameters. I would replant the tops and kept environment more stable.

Also, dosing extra K is going to make the situation worse. There is plenty of K from the original fertilizer and form the RO Essential Minerals.

The CO2 calculation will not work since you are using pH buffers. I think a drop checker could help here especially when you have a sump. There could be unexpected CO2 loses.
 

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Discussion Starter · #3 · (Edited)
thank you Edward. I do have a drop checker and will install as directed. Why would the buffers affect the calculation between pH and KH? I mix to a ph of 6.5 for reference.

Bump:

This is how the plant arrived. I think that lower leaves were always smaller.
 

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thank you Edward. I do have a drop checker and will install as directed. Why would the buffers affect the calculation between pH and KH? I mix to a ph of 6.5 for reference.

Bump:

This is how the plant arrived. I think that lower leaves were always smaller.
After seeing that photo don't stress. You're seeing emersed growth (as it was purchased) convert to submerged growth (as it is now).

Just top it, get rid of the ugly bottom, and enjoy the new nice leaves!
 
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