@@hillman, Laughing Buddha is half Thai and Jamican. Both Thailand and Jamica have tropical climate ,temp can reach up 37C in Thailand. That's why I dont want temp to go below 27C , Thank you anyway!
@TropicalCAT, that would be the mecanics of it, however without a proper read you can´t be sure of the exact temperature. Try a solution temperature of 20°C for a week. It is the ideal temp for nutrient absorbtion. Day air temp 25°C.
@Mrs_Larimar,Thanks for advice but Im pretty sure its not bite mark.
these spots appear only on particular lower leaves which means this is some kind of deficiency.