Help on Japanese Hair Grass!

[ahpui6]

Sorry to trouble you guys again!

For some reasons, my Japanese hair grass are turning brown recently, especially at the tip of the grass. Specifications are as follow:

Duration: Tank is 2 months
Dimension: 60cm by 30cm by 40cm (Height)
Substrate: ADA Powder Amazonia (1 Inch thick at lowest point, 4 inch thick at highest point)
Lights: Aquazonic T5 Super Bright (2 x 24 w) and Beamswork Hi-lumen 60 (48 x 0.5w - 42 x 10000k & Actinic 460Nm x 6)
Light Duration: 8 hours/day
Co2: 1.5 Bps
Fertilisers: Seachem Potassium 4ml/day, seachem iron 0.5ml/day
Fauna: 18 x white cloud minnows, 22 x galaxy rasbora, 7 x otocinclus
Other information: Japanese hairgrass growth has been rapid. Achieve a lush carpet within a month. Start to turn brown only 2 weeks back only.

Greatly appreciate bros who are great carpet growers to advice what are my plants lacking or is there a mistake in my regime. Many thanks to all advice!

[Urban Aquaria]

Start dosing micro/trace fertilizers, any comprehensive all-in-one formula will do.

Micro/trace nutrients usually get used up very quickly in a planted tank (especially in high-tech tanks with Co2 injection and fast plant growth), so those nutrients need to be supplemented to support further plant growth.

Also check your nitrate levels, it may also be bottoming out at this point in time... so if necessary, you may need to start dosing macro fertilizers too.

[ahpui6]

hey, thanks UA once again. anyway, whats micro and macro fertilisers? what is their difference and what do they do?

[Urban Aquaria]

hey, thanks UA once again. anyway, whats micro and macro fertilisers? what is their difference and what do they do?

Well, macro nutrients are nitrogen (N), phosphorus (P) and potassium (K), they are utilized in larger amounts by plants hence are essential for healthy plant growth.

Micro nutrients comprise of all other nutrients and elements that are required in trace amounts (hence usually referred to as micro or trace fertilizers)... like boron, calcium, chloride, cobalt, copper, iron, magnesium, manganese, molybdenum, sodium, sulfur, zinc etc.

Both macro and micro nutrients are required by plants to grow healthily, if any nutrients are deficient, then the plants will start to show problems in health condition and growth.

[ahpui6]

Oh, that paints a clearer picture now. I guess i have to get a micro fertilisers now and see how it goes from there. Thanks UA!