Thank you everyone for your tips, greatly appreciated.
Few days later I have already completed two water changes and whilst still high, ammonia has reduced to around 6-8ppm. I keep doing water changes every few days to keep it from going too high.
Plants are thriving, the small ones have plenty of side runners and the stem ones are growing new leaves everyday.
I'm keeping up with daily excel dosage. Stability is a product designed to introduce beneficial bacteria to the aquarium and speed up the cycling process, whether is making a difference I don't know but I'm hoping that in the next week or so my aquarium will be completely cycled.
Thinking of adding red cherry shrimps, oto catfishes and cardinal tetras... any suggestions?
I take note of your advice to plant more but at this rate of growth in a couple of weeks i would be able to actually do some gardening cutting and replanting some of the stem plants to increase plant mass in the tank
I'm going to try and stay away from ferts and bottled CO2 for the time being, keeping it simple. Will see how it goes! I'll upload a new picture in the following days!