I’ve been mixing mosquito bits in the pot/soil with great success. I toss in a handful about every 6 months. When I repot, I mix in roughly 1/2 cup per 4 quarts soil medium. Make sure the top inch of soil has a chance to dry out between watering. Make sure you don’t have water standing in your catch trays when watering. Switch out for aggregate clay or lava rock instead of a soil medium.