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Yellow Hemianthus cuba + spots on staurogyne

Silas Felipe

Seedling
Joined
1 Mar 2015
Messages
1
Hi everybody

My Hemianthus cuba is getting yellow. After seeing the symptoms on the internet, I realized that may be lacking in nitrogen. I started last week a treatment (Seachem nitrogen) and the leaves are still yellow. I realized also that my staurogynes are with black and transparent spots on their leaves. Could someone tell me if it really shortage of nitrogen? And these holes in staurogyna, which can be?

My setup:
Size: 60x30x30 - 20Gallons
Lighting: 4x24W - T5 JBL
Substrate: ADA Amazonia + ADA Power Sand
Fertilizer: Brighty Step 1 - 3x times per week + diary brighty K
PWC: each 3 days (40%)
Temperature: 28 ° C (82 fahrenheit)
PH: 6.8
KH: 6
GH: 5
Amonnia: 0 ppm


Sorry , about my english. I am Brazilian.

Obrigado!

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You might also reduce the lighting,
how long are lights on?
when is CO2 on?

You might also reduce the temp if possible as this would increase dissolved gasses (C02 & oxygen).
 
As mentioned above: textbook CO2 deficiency. Just by looking at the pics, most of the CO2 bubbles are reaching the surface. Consider installing a spraybar along the back of the tank for maximum distribution.

What filter are you using?
 
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