I have a Peperomia Obtusifolia which has developed brown leaf edges and spots prior to this it was growing well and no issues.
I have tried to diagnose the issue which seems similar to black spots on rubber tree and brown spots on rubber plant
When it was first noticed nothing had changed in terms of watering or placement and the only thing would be the seasonal temperature i.e. central heating in the day and no heating at night, the air humidity reads about avg 55%.
I suspected it could be root rot so cut the watering down but the roots/soil looks dry if anything.
Any ideas