Hi all, My plants were doing great. But recently, I am spotting these brown marks on one leaf and the other leaves are turning yellow. I reduced watering because the temperature is low (5-7^C outside and usually 16-18^C indoors). I use yellow lights because sun had been hiding constantly 😑 But they are right next to window, so whenever there is sun, they get it. They are potted with Miracle grow tropical soil mix and perlite. I checked the roots and they seemed healthy, some white roots too. Any suggestions to help them survive? Soil change? Will appreciate any suggestions. Thanks!