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20 long tank
finnex 24/7 just running whites 8 hours.
Pressurized co2 + diffuser + powerhead on top to better circulate co2
Flourite black sand + Flourish Root Tabs
Aquaclear 30 and just added surface skimmer couple of days ago

the first pic is on 4th day of adding all the baby tears and the pics after is today.

I have the same substrate in a 7 gallon and its growing like crazy just like in this 20 long as well but just noticed some leaves are turning yellow, I dose pottassium so it's obviously not that. Could it need more root tabs? Tank was set up 1month ago.
 

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20 long tank
finnex 24/7 just running whites 8 hours.
Pressurized co2 + diffuser + powerhead on top to better circulate co2
Flourite black sand + Flourish Root Tabs
Aquaclear 30 and just added surface skimmer couple of days ago

the first pic is on 4th day of adding all the baby tears and the pics after is today.

I have the same substrate in a 7 gallon and its growing like crazy just like in this 20 long as well but just noticed some leaves are turning yellow, I dose pottassium so it's obviously not that. Could it need more root tabs? Tank was set up 1month ago.
Hi sugirthan7854,

That is a lot of light over a 20 long; my guess would be a nutrient deficiency of some sort. It could be iron, a lack of iron will cause yellowing leaves but it could also be a lack of nitrogen which typically causes older leaves to yellow first. Which leaves seem to be yellowing....the new ones or the older ones?
 
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