First of all Dwarf hairgrass needs high light, CO2 or high doses of liquid carbon, and good fert dosing.
What is your lighting and bulbs being used? Are you using CO2 or liquid carbon? What about ferts?
I'm using flourish seachem 2 t8 bulbs, dirted tank. and im using co2
20 gallon tall or long?
so planting dwarf harnesses will spread into a over time?
so planting dwarf harnesses will spread into a over time?
The easiest way to grow dhg given your dosing ferts have high enough light and co2 is breaking the bunch in separate pieces each consisting of 4 or so blades and planting them in a checkerboard pattern.
Dwarf hair grass sends out runners. It will naturally form a carpet as it spreads out. However, I doubt two t8s over a 20 tall will be able to carpet it. I feel you would need atleast one t5, maybe two.
In a pinch cfl lighting in a dome lamp is a cheap way to get High light. I'm running 2-23 watt cfl bulbs at the moment in my 20H for high light and everything is growing well. I'm not growing dwarf hairgrass though.
Now are 2 54w 6500k T5HO daylight bulbs high light? Would it be ok for DHG I had 4 but had a bba problem so dropped it to 2