You may want to add one more t5 or a Finnex Ray II to ensure you'll be able to grow glosso. It likes a lot of CO2 as well. I'd suggest you start the carpet dry first to get the roots established and then you can flood it. When you flood it let the water be around 79 degrees and slowly adapt the plant to the higher temperatures (maybe add 1 degree every few days). I agree, glosso + discus looks amazing and I plan on doing the same in a 75g. Currently I'm growing glosso in a 10 and its relatively CO2 demanding but grows great if you can keep the lights and CO2 in check.