Advice

I'm guessing your using canna aqua. Start at 1/4 feed. Keep all light away from water. Light leaks or clear tubs are not good. If you can keep your water temperature below 70 and ideally at 65 you should keep root rot away. Have some hydrogen peroxide 3% handy just Incase. Do a full water change once a week in flower and bi weekly in veg. Or if you run into any bad looking leaves. PH is god. Keep it between 5.5 and 6.5. it only takes 1 hour of being out of range and you will get funky leaves a day or so later. Check ec same time daily to compare to previous days. It will fluctuate with lights on/off

I dunno about canna nutes. I think there organic right. If there anything like biocanna you are going to have real problems in DWC as the PH is so unstable in biocanna products. I'm nearly sure canna are the same. What's the PH on the products. On my biocanna bioRhizotonic it's 10.5-11.5 And 2ml/l makes my 6.3 PH water go up to 10.3. But when using with PH perfect AN products it evens out. Search canna products and see who's doing DWC. But again I think canna is more geared towards soil. I might be wrong on that though. Good luck.

Hey, I'm also moving into DWC. I hear GH tripack is the most stable also a good root stims like voodoo juice and also forakleen by GH for root washing, focus on roots in DWC, the bottom is probably more important than the top when it comes to regulating PH. But I hear GH tripack is good. Also if yo8 have hard water, get the hard water pack. You'll know if your water is hard by it's PPM. Anything around 150-200 is hard water most of that ppm is cal mg. If using tap water and it's hard bubble it for a few hours should help. Or not, That's just me, I'd want the cleanest water I can get doing DWC. Try keep the PH 5.8-6.3 max. PPM starting of 2-400 For first 2 weeks and push up 50-100 Or more weekly depending on plants requirements. If you need more info feel free to DM me. Good luck moving into DWC. shall be joining you soon.