Dark color and pores in my java fern.

[CT_]

I noticed today that my java fern has little sectors with pores in the middle of the leaves.  also some of the newer leaves developed dark tips in the last day or two (or at least i just noticed)  

ammonia is <0.25 (probably 0) nitrate is 5-10 ph 7.8, i use a little seachem equilibrium, 0.5g/gallon.

[Fish Folk]

Very generally speaking, if a plant is not getting all of the nutrients and energy source it needs, it consumes itself — or “let’s go of” parts of itself to either reconstitute energy or conserve. 
 

There is a common chart often referenced that displays various common plant problems and potential causes. (See below)

But a very helpful 15-min video from Cory at Aquarium Co-Op is often recommended on the forum here: 

 

[CT_]

The chart is the first place I looked but it doesn't cover either of these.

[Fish Folk]

1 hour ago, CT_ said:

The chart is the first place I looked but it doesn't cover either of these.

It appears like your leaves are turning clear-ish. I think Cory talked about that in the video. 

[Daniel]

On 1/28/2021 at 2:19 AM, CT_ said:

I noticed today that my java fern has little sectors with pores in the middle of the leaves.

 

Java Ferns are indeed ferns. Those little sectors with pores are the reproductive part of the fern life cycle known as sporangium.