issues in flower DWC

I'd bump up the nutrients to 650-700 PPMS (EC 1.3-1.4). ph 5.5-6.2 (I like 5.7-6.1 for flower) RO water has very little buffer capacity so using pH down directly in the RO water might cause some problems so you will probably have to pH after you mix your nutrients. When I top off my reservoirs in mid-late flower I reduce the amount of cal-mag per top off because calcium and mag (plus some other elements) are removed slower than P and K. In your situation with such little water volume per plant, I would add nutrients and water probably everyday. If your EC is rising a lot, use 50% feed on your top offs... maybe only water. You could plan what you will do each day, but until you see how the plants react and check the reservoirs, it is all a guess. The plants are the bosses and will tell you what they want if you listen. Your damaged leaves won't get better, but your new growth should be nice and healthy. Good luck!

Don't fall for dumb dumb grannies agreeing with you, hasn't got a clue what you are on about mate. She means we'll, old bag stinks though

I'm going to agree with all you say and point out the obvious in the hope I get best answer for my agreement and no advice 👍

I think your plan sounds good actually, although I do not grow in hydro but I can understand what it is you're trying to do. It's good that you've added the calmag as the grow is exhibiting a calcium deficiency... As far as the damaged leaves are concerned, they're not going to repair themselves so please don't expect that... But good plan - water/feed/water! And definitely make sure that pH stays stable! I might also suggest you start a diary for this grow... that way, when issues/problems/questions come up about it, we'll have all the information necessary to give some reasonable advice! Good luck! Please click on the grower's name that is answering your question to see their profile. There are fake accounts being created to look EXACTLY like real accounts - but they're easily identified by doing this ... At this point, the only targets for this are m0use and myself...

How i plan fixing it: Fill the 20L buckets with 4L Ro water 10Ppm each + 1L Ro water mixed with advanced nutes Bloom, B52, big bud, micro, cal mag (reaching 500Ppm). Then i'll add the 1L 500ppm to the 4L Ro= 5L (XY)Ppm, ph 6 24hrs later top with 10PPm Ro water with the same amount they drank in the last 24 hours, reaching back the initial 5L. Basically 2-3days of water, 1 of food (5-600ppm) and so on. What ya'll think? thanks.