dutch pro nutrients PLZ HELP!!

Chez81

Member
this is my first grow and im using dutch pro nutes. How often should i feed them the nutrient solution each week? once a week and the other 6 days just water? i was feeding every day 200ml of half strength solution but this has caused them to overdose on nitrogen and given some of them "nitrogen claw" on some of the leaves. this was obviously too much feed so what should i be feeding them and how often?
 
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