Hey guys,Happy new year

My potted plants on the GS and cocoa fiber background in my 30gal hex aren't doing so well.when i first started the tank the plants were doing great but now the growth has stopped and some leaves don't look so good.even the creeping charlie not doing so good.the potting mix is just cocoa fiber and sphagnum and for lighting i have 20 watt spiral 6500k bulb and 1 florescent tube 15watt 5500k.i read that fish tank water and old coffee grounds are good natural fertilizer so i did both.

is there anything else i can do or does anyone have any suggestions for me?

thank you
Griffin