What else to dose for glosso?

[s11loop]

Hi all currently my tank is 13 litre, 2x t5 8w, using GEx soil, tempreture around 22-24 degree and only dosing excel at the moment, I can see growth but not fantastic, can anyone tell me what else should I be dosing? I am keping CRS so anything else to dose that will not affect my shrimps? Thanks

[barmby]

You should dose CO2 if you want fantastic growth.