I would use kratky with plants that i didnt care about like lettuce, but not with pot plants. The problem with krakty is there is no oxygen being put into the water (plant breaths through upper roots not in water). It does work but it also has more opportunity for root rot and other issues. Full disclosure, i have never done krakty but have seen people do it (on veggies) and the water by the end is like pond scum. My personal opinion is it's better to have the extra oxygen to help prevent any anaerobic bacterial growth. If you do try it i would love to see results because i could be wrong. I personally do the bucket method with air stones. If i could legally grow pot where i am i would give it a try myself but since i cant, every plant has to be a producer for me at the moment.