When ppl get leaves like this and use calmag I always ask what you waters like, hard or soft? So in UK hard is usually about 7.4 for me, so full of calcium. So if using extra cal, it causes a build up for me. I've ditched cal products now because I just don't need it. Googlin your water company quality in your area should tell you if it's hard or soft. See where we go from there.