So I've got some L. brevipes with new curled leaves. Well rather, I had brevipes with curled leaves. But once I skipped my water change for a week (EI dosing blah blah blah) my deficiency went completely away. What in the water could have done this? Maybe some pollutant in my tap? Simply because building up pushed me over the deficiency gap? But then again what could the deficiency have been then since my tap is about 4ppm mg and 30ppm Ca (pretty optimal for plants). Boron did not rectify the issue. And dosing MASSIVE amounts of GH booster did not. Although in retrospect the boron may have had a slight effect on the leaves but the new growth was mottled and just not pretty as a result.