As for hc you will need high light and lower temp so that it will grow better.
Hc carpet emersed.
In the submersed form it looks almost same as an emersed form with cushion like growth or low carpet.
It s almost tempted me to start a palaudarium.
But it does demonstrate that high light no co2 doesn t always translate into an automatic algae fest that is if the plants are growing well.
However i think the initial 1 month of being established when emersed helped a lot and prevented algae issues with the hairgrass.
It will carpet but the leaves are a totally different shape than dwarf baby tears hemianthus callitrichoides pictures below hemianthus micranthemoides giant baby tears pearlweed hm hemianthus callitrichoides dwarf baby tears hc hope that helps.
Its also known as pearl weed.
This method should work well for all mosses most grasses and most other carpet plants like hemianthus callitrichoides and glossostigma elatinoides.
Cuba has smaller leaves and a bit narrower.
This video is of my little h.
Majority in the trade or aquaria market sells cuba in the emersed form and it has roundish leaves.
This light level is probably excessive.
With excel and ample lighting the hairgrass was spreading much much faster and denser on submersion.
Imo it s all about lighting and co2.
Light will be medium high.
17 days from planting three small 4x4cm pots of hc.
I have grown hc emersed and submersed it it loses some of its leaves but doesn t take forever to grow back.
Just started my hc carpet 1 5week ago going to complete the emerse to submerge stage.
Mosses in particular have very different emersed structures and can be quite cool looking.
Another two weeks and i expect it will be covered.
I don t think emersed growth works as well for hairgrass in terms of getting a very thick coverage like with hc.
Sometimes you can see the tiny white flowers in the axils.
Will hemianthus callitrichoides require co2 to carpet if a part of it is emersed.
Glosso will be a better choice if it is frst time trying.
The carpet of glossostigma in the picture below is grown using 150w metal halides hung 2 feet above the tank.
The emersed part will be misted and fogged regularly in the paludarium.