I've been running a couple homemade 6 plant bubble totes but haven't been doing full rez changes . I breed siamese fighter fish and from experience with fish what I do with my rez is pump out 25 -40 % of nutrients and top up with new nutrients with same amount that I take out . Once a week I would check the ppm and if it gets to high then I just add plain ph'd water . The strain I am running is white rhino , it is a bit sensitive to nutrients so I keep ppm at 5-600 . I'm running canna aqua a+b and all the additives but use calimagic in my rez and canna boost as foliar feed . Plants are in week 4 of flower and full of sugar . Just wanted to know is a full rez change needed. My roots show no signs of root rot and plants seem to be flourishing. I know some people might be reading this and saying wtf foliar feeding with boost . I've done the same system in the past but could never dial the plants in when I used both at same time in rez. I was thinking of only doing a full rez change when I get into using pk 13 14. My totes that I use are 54 litre but only get filled to 40 litre , a inch under my net pots . Has anybody tried this method of growing before ? I seem to have this plant at its best with no deficiencies. I use a shit load of cannazyme but have never needed to use h202. Any peeps out there with similar setup to mine that have had success. Much appreciated on any input