Choose a carpet plant that is most suitable to yr tank conditions.
There are plants that need high light, CO2 and good fertilizers others can grown in low light, no CO2 n a bit of fertilizers. To see good results try to give them good conditions.
A list of plants that can be used to carpet an aquarium
*Elocharis Parvula-Dwarf hairgrass/Elocharis Acicularis
Marsilea Crenata/M.Hirsuta/M.Quadrifolia/*M.Minuta
*Sagittaria Subulata/S.Pusilla/S.Platyphylla
Hemianthus Callitrichoides Cuba/H.Glomeratus/H.Micranthemoides
*Lilaeopsis Brasiliensis-Brazilian microsword/L.mauritiana
Hydrocotyle Tripartita
Riccia Fluitans-crystalwort
*Echinodorus Tenellus-Pygmy chain sword
*Glossostigma Elatinoides
Utricularia Graminifolia
Pogostemon Helferi
*Staurogyne Repens
I've marked the plants I've used with an asterisk*
I got good results with high lights, ferts n Co2 Glossostigma Elatinoides, Staurogyne Repens, Sagittaria Subulata.
Low tech (shrimps only aquarium) Excel n low lights best results were achieved from Marsilea Minuta-slow grower but beautiful n strong.