I've given up on HC Cuba / DBT. There are bits of it floating in my tank. It's actually doing fine in some terrariums I set up. Lots of trouble keeping it down and it is slow grower for me.
I have not tried Monte Carlo but I've heard it is not that difficult.
Now the Glosso is another story. I planted it in January and two months later it has taken over 2/3 of the tank. I even cut a 2"x8" strip along the front glass to thin it out and planted that in other parts of the tank. Within a week there are several runners breaching the cleared area. I have pressurized CO2
, daily GLA PPS-Pro ferts, EcoComplete, a Finnex planted+ and FugeRay over a 20g long (12" tall). Lights are on separate timers; planted+ for 5 hours, FugeRay for 4 hours with a 1-2 hour overlap. It was on a 4 hour overlap but the green spot algae and string algae started to develop so I scaled I back a bit.
Day I planted it. HC Cuba in the middle, Glosso on the right:
Two months later:
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