Ok I've made a huge rookie mistake. My 74 year old mother swore to me when I started getting houseplants that I had to line the bottom with rocks. Now I have way too many to repot (yes i bought that many since late winter without doing all my research I guess). I've had fungus gnats on just one plant. I repotted and it's fine now. Can I just go with what I've done and repot if I see anything? Also I have a few growing mushrooms. Do I need to repot those?