I got a big self watering pot with 3 different plants. After some weeks it got some mold (something like this, but I got it earlier) in it and after trying some stuff in the internet I ended up changing the soil to stop the mold from growing.
In this pot there is a fern, a fittonia and succulent and I'm starting to think the fern is getting too much water.
I also got 3 other self-watering pots. One of them has an oregano, another has a small pepper and the last one has a cherry tomato. The oregano has some leaves with brown tips (I learned here that it might be overwatering), the pepper is not very good as well (some pictures here), and the cherry tomato is not the best either.
I keep all those plants indoors, there is no direct sunlight but there is clarity.
Are those pots viable for this situation? I feel that my plants are getting too much water and the mold seems to be a problem too, but I'm an absolute beginner on this.
As per request, following are some pictures: