Hair grass problem

[Et66]

Hi,
The Japanese Hair Grass seem to be turning yellowish and black.
Can someone please advice the reason and remedy?
Thanks in advance.
Tank size: 60x30x36cm
Lighting: 01 UP Aqua Z series LED 21.3watt
Lighting and CO2 period: 7 hours
CO2: 2bps
Fertilizer: twice a week Borneowild Vivid/Essence K/Ferrum,Phosphorus,Flourish Excel.
Substrate: Borneowild plant soil
Water change: once a week 20-30%

[thebaldingaquarist]

It looks like the ones i have in my tank.
i leave mine alone. the dark patches will be overtaken by the green ones. the yellow ones may be receiving too much light (intensity).

Remember to give your HG a trim. this will spur new growth and promote circulation within the HG.

[David]

Errrh...don't see anything wrong...

[Dodofish]

It could be due to excess iron prosphate in water. Perhaps can reduce the dosage?

[Et66]

Hi guys,
Thanks for the reply.
I thought the hair grass was dying or under algae attack as some are turning black and yellow. I was thinking maybe there was insufficient light and almost bought a Odyssea Evo24 LED lightset in Marketplace but it was sold to someone else.
I will monitor and update, thanks.