Algae can grow on the wet substrate but it won't be able to grow on the leaves of the plant itself, which is a common complaint for growers of HC, dwarf hairgrass, lilaeopsis, e. tenellus, etc. There's also no need to worry about excess fertilizers causing more algae. I know someone who uses MiracleGro, something no one would use in a water filled tank.
A big advantage is no CO2 limitation, the CO2 concentration in the air is enough. So for the inexperienced CO2 user, this is a great way to get a lush lawn. All bets are off once they do fill the tank off course.
Transplanting the whole carpet doesn't sounds like more work. Why grow a carpet in one tank and move it over to another when you can grow it in one and leave it there? This method allows you to grow the foreground around your hardscape, rather than having you transplant around your hardscape.
A big advantage is no CO2 limitation, the CO2 concentration in the air is enough. So for the inexperienced CO2 user, this is a great way to get a lush lawn. All bets are off once they do fill the tank off course.
Transplanting the whole carpet doesn't sounds like more work. Why grow a carpet in one tank and move it over to another when you can grow it in one and leave it there? This method allows you to grow the foreground around your hardscape, rather than having you transplant around your hardscape.