Welcome aboard Fundoo! Can you provide a pic? Also not sure about the "watts" on your light can you provide more detailed info?
Generally speaking, Glosso, HC Cuba & any red plant will need high light (PAR) and Co2. Are you dosing any fertilizers?
DIY Co2 isn't usually recommended on tanks over 10 gallons. Do you have a drop-checker or any way to measure your Co2. Co2 tablets are probably useless as well.
Good luck and keep posting:-)
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