Hi all! :( I am using RO water 030ppm. 200ppm(0.4ec) canna calmag agent 400ppm canna aqua. HPS 600w. 25с, 40-50%H, ph 5.7-5.8 total ppm ~ 550-650. I d

Gmslave is correct you should not feed Calcium at such high doses.. some growers don't have to use cal-mag at all.. I use barely any as well. Excess nutrients of any kind can cause problems and make your buds taste harsh...

gmslave, all young plants look good until they start growing ... it doesn't look like a deficit

gmslave, it overdosing on calmag ? yeap i add 200 ppm(04.ec) calmag agent canna. temperature nutrients 23c.

Just feed your girls at 1.2, all aqua vega a and b for now. cut out the cal/mg for now and keep your water cool. Overdosing on cal/mg isnt good. They'll come around.

If your using a and b and giving 200 extra cal/mg, that is your problem. Cheers

The8thChevron , hi i used canna aqua veg a+b

Are you using Canna Aqua Vega A and B? Just using one or the other will cause deficiencies. Also if you're using the Flores and not Vega, then it's not the right stuff for this stage. My next guess is that your res is too warm and is causing issues. Some Hydroguard or something similar would be beneficial.

Try lowering your cal/mag to around 100 ppm if you need any. Try running without it for a week or 2, see to see if things stabilize. canna aqua contains cal/mg and I only added a little when I needed to. Adding to much cal/mg causes problems as well. Try to keep your water cool. Cheers