@Camille but how often you use it and the measurement? Please 🙏
I follow the instructions given here on Orchidboard. 4ml/liter water, applied once per month (every 4-6 weeks in my case, as I sometimes forget). All new plants also get a kelpak treatment when they arrive, and they seen to recover faster with it.
__________________ Camille
Completely orchid obsessed and loving every minute of it....