Java fern deficiency

[Jacob Hill-Legion Aquatics]

I was wondering if anyone could identify what my java fern is deficient of. I'm dosing tropica specialised nutrition 2 pumps per day and my tank is a 10 gallon, I have co2 and its about 1 bubble every 2 seconds, I'm using a JC&P full spectrum aquarium light at 50% for 8 hours a day. Also all my other plants are doing great and there's visibly no algae. The new growth from the java fern is healthy its mostly the old stuff that's turning brown.(sorry if the photos are not the best quality)

Edited March 20, 2022 by Jacob Hill

[ange]

Running CO2 in your tank means that nutrients are generally consumed at a faster rate so you may need to dose more frequently than the packaging recommends. I don't have any experience with the brand so this is just general advice as to how to start troubleshooting.

The yellowing starting at the tip indicates nitrogen deficiency* and pinhole in your third photo indicates a potassium deficiency. Java ferns get outcompeted for nutrients by stem plants in my experience so this may be the issue if none of your other plants are showing signs of deficiency.

*It's hard to tell based on your photos but if it's yellowing with brown patches it's more likely a phosphate deficiency than nitrogen.

[Jacob Hill-Legion Aquatics]

On 3/20/2022 at 7:40 PM, ange said:

 

The yellowing starting at the tip indicates nitrogen deficiency* and pinhole in your third photo indicates a potassium deficiency. Java ferns get outcompeted for nutrients by stem plants in my experience so this may be the issue if none of your other plants are showing signs of deficiency.

*It's hard to tell based on your photos but if it's yellowing with brown patches it's more likely a phosphate deficiency than nitrogen. 

 

K thanks for the reply but  I think I'm already dosing a lot of ferts because the recommended amount is 1 pump per week and I'm doing 2 a day. so its probably a potassium deficiency because the fertilizer has a lot of nitrogen, do you know any products that add extra potassium?   

[Patrick_G]

For some reason I can’t see the pics. 
How long have you had the Java fern? I’ve found that it can take a long time to convert from being emersed grown in air to submerged growth. 

[Jacob Hill-Legion Aquatics]

I've had it for probably 2 months now and it was growing well until it started to show it was deficient in something.   

[Patrick_G]

My guess is that it is indeed going through the conversion process. I trim off the dying leaves, so the plant can put energy into new growth.