I started a green wall 2 months ago.My medium is felt and everything is going pretty good. I'm watering every 6h with a 600ppm A/B fertiliser at ph 5.8. The felt is draining very quickly so i can't increase time between watering.
2 weeks ago, i had problem with my cheap pump who ran way too long. Since then, i have white mold groing on my felt. Tried to kill it by spaying 1% h2o2 solution on it but it still comming back. Plants still looks nice and grows. What can i put in my water to get rid of it?