Originally Posted by
toblue
Take this this scenario as an example. I am 4 weeks into flower, 300 litre RDWC 8 plant system with a 200 litre header feed tank nearly empty. My feed chart says at week 4 to add 10ml of PK per 10 litres and top up with base feed to 1.2 ec. The only way I could get that solution into my system at 4 weeks would be to drain and refill the system. If I put the PK solution into the header tank to drip feed it would never really be at full strength PK as they would only be drinking around 20 or so litres each day and the 20 litres coming from the header tank would be diluted with the 300 litres in the system.
In coco my first feed at 4 weeks would contain the full 10ml per 10 litres of PK and into the 5th week it could be reduced exactly to 5ml per 10 litres. It is the slow dilution from the header tank into the system. I don't understand how can i time the feed changes accurately from week to week.
Another thing is, in RDWC the nutrients are fed at a much lower ec so do I also half the quantities recommended for boosters and pk?
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