stinky, i think that is a fairly good call. from what i read and my plants suffered it does look like a calcium deff. (i almost wrote clam,lol) too much potassium and lockout(low ph) can cause that, weather there is enough calcium or too much. i did a little treatment(3 dailys) of foliar wormcastings and sea bird guano(0-12-1) that really seamed to help(by the third day they were looking better). plus a multi vitamin, but im not sure about that. now they are in the woods, lol but i will let you know when i check them again. i thought i had a little mg deff. too so it did look slightly different.