Q.Hi, Can You Tell Me What These Brown Spots Are All Over The Leaves On This Plant. Also How To Treat It.
Plant was fine then got these brown spots on leaves. Is this contagious to other plants?

Certified GKH Gardening Expert
Brown spots can occur due to improper watering, fungal disease, too much sun, or root rot. Make sure you let the soil dry out between waterings. If you think it is a nutrient problem, repot the plant in fresh soil. Too much fertilizer can result in fertilizer burn, which causes brown spots on leaves.
The spots on your plant may be due to overwatering. Let the soil completely dry between waterings. Overwatering is not contagious to other plants (unless they are being overwatered too), but insect pests and diseases can travel.
These articles should help:
https://www.gardeningknowhow.com/houseplants/kalanchoe/growing-kalanchoe-plants.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/watering-succulent-plants.htm
https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=30298