The main things we'd need to know is..
What size is the tank?
Is your Co2 a pressurised system, sugar yeast, co2 tablets etc?
And what is your fertilising regime, if you have one?
You'd be able to stop the hair algae in its tracks if you up your CO2 and determine a good fertilising regime. All the info can be found in the pinned articles. But there's loads of really informative people on here (im not one) who can help with all the above things.
For Glosso to grow you'd need a nutrient rich substrate and a fair amount of light, anything in the region of 2.5 watts per gallon or above. But this depends on the size of your tank.
Riccia is more forgiving and should do reasonably well with lower lighting.
If you decide to go down this route then both can be quite high maintenance. The Glosso once thats settled in can grow like a weed and needs regular trimming or even uprooting large portions.
The riccia requires re-attaching to the rock / slate / pebble every couple of weeks as it will slowly detach itself and float to the surface.
But i'll say it again your tank looks really nice at the moment
paul.
edit : wooops seems im too slow when it comes to typing
