Great Thread and postings here..Thanks! Just thought I would add some Pic's of my own..Hope these can help.
View attachment 2203141View attachment 2203144View attachment 2203147 This is a Calcium deficiency. This was NOT caused by lack of Ca in my mix! I'll explain in a sec...This deficiency was caused due to a lockout! My Ph in my DWC set up rose to 6.2 for a couple days
Calcium will get locked out in Hydro above 5.9 and in soil below 6.4 If I would have added additional Ca to my system,I would have created a toxicity! Therefore making matters worse! Before adding more Fert. to treat a deficiency be sure you are checking your Ph levels also! At the first signs of a deficiency,correct your Ph if needed FIRST!...THEN add more fert if NEW growth is still affected. Once a leaf is scarred it will NOT heal! I've seen posts where people expect to see the damaged leaf heal,and when it doesn't they continue to add more fert! BAD!
BTW I am using AN sensi bloom A/B. It already has Ca in it! A/N recommends(on a DWC setup) topping off the res with 100ppmCal/mag(r/o water) which I do. That is why I know it is due to a lock out(plus my Ph reading was obvious!). Thanks for letting me throw my 2 cents in...Grow in Peace!!