That.loks.normal.to.me.an.definately.not.a.Mg.def. .Pic.1.is.way.overwatred(I.had.this.problem.with.a .few.clones.once..The.new.growth.is.usually.lighte r.green.till.the.leaf.opens.and.the.light.activate s.the.chlorophyll..When.they.get.bigger.you'll.not ice.that.leaves.and.branchs.in.the.shade.keep.the. light.green.color.til.they.are.exposed.to.light..

Stop.overwatering!