I recently noticed a white mold/fungus type growth in one of my pepper container plants. I stopped watering as often and the problem seemed to clear up for the most part. I waited an extra day or two before watering again, and the problem came back even after a 3-4 day wait between watering. I have been scraping it off, and it has started to turn a brown color. It's only happening on the very top of the soil. Any ideas? Should I wait 5 days between watering? We have had temps in the high 90s-low 100s lately, so I assumed my plants would need the water more often, but now i'm worried about watering this plant. I would love any suggestions or fungus/mold killer suggestions!

Thanks!