please help, yellow and brown leaves

canna newts
growers choics 720s
ph 5.9-6.2
cal mag agent 5ml/gal
magnum 5ml/gal
flood and drain in rockwool

hi mate,i think yu have low lvl ph, i think if yu go from 6.5 up to max 6.6 it will go away in few days,

cassassin said:

hi mate,i think yu have low lvl ph, i think if yu go from 6.5 up to max 6.6 it will go away in few days,

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would be the case in soil, im all hydro / rockwool. ph should never touch higher than 6.2. thank you for the response i appreciate it

yes you right didnt realize...mb, hope you will find right answer good luck