Brown Java Moss

[Tweezer]

I setup a 40 gallon breeder in August with a clump of java moss and some potted sagittaria. The java moss doubled in size but over the past two months I have noticed large sections of brown with new growth in random places. I have a Planted 3.0 running 14 hours a day at full power. Last week I reduced it to 8 hours at 60%. There is also a bit of green hair algae in it. Hopefully that will be reduced with the new light schedule. 

If you have any recommendations please let me know. I can provide more info as well. 

[FrozenFins]

Do you dose plant fertilizer?

[Tweezer]

No I do not. I have some easy green but have never used it. Originally this java moss came from a clump in my 20L which is still doing well (dark green with light green new growth at the tips). 

 

Edit:

That was a pretty heavily stocked tank though and the nitrate levels were higher. 

Edited December 11, 2020 by Tweezer

[Wes L.]

My guess is it's a combination of too much light and too little nutrients. It sounds like your new lighting schedule should be a big help. Besides nitrates, there are a lot of other micro and macro nutrients that plants need to flourish. I'd start dosing fertilizer since you have it. I bet your moss will bounce back given some time.

[Tweezer]

I started adding easy green last week and we will see what happens over the next month.