Thank you,
Yes the soil food web is a deep rabbit hole as I have discovered, luckily it's not too dissimilar to marine fish tanks so the concepts aren't unfamiliar.
My girl has bounced back quite well from her setback, I will upload some pics soon. Leaves still aren't quite straight and firm, still seem to be a bit droopy but I've had about 5cm new growth in the last two days. So I'm pretty chuffed with the advice already recieved.
Thanks all who responded.