Im so sorry I couldn't find a way to turn these photos the right way but I hope it's okay! These are my two ZZ plants I quarantined because they had fungus gnats. They had already gotten inside the soil. First I used insect control that I sprayed on the soil and let it be for a week I also had smaller fly traps installed there. It didn't work and then I repotted them by cleaning the roots and the pot thoroughly. I also sprayed them with a new insect control that was a bit more organic and had some fertiliser also to boost the plant. After repotting I put them back to quarantine and added bigger fly traps. It's been a week now and I haven't seen any fungus gnats flying out of the soil and only a few appeared on the traps. I will keep an eye on them and continue the quarantine a little while longer to make sure there aren't any coming back.