I have several different plants growing in my tanks and I know Pothos you need to root separately first because the stems of a fresh-cut plant can leak toxins. I have rose cuttings I was trying to root in water. It requires the water to be changed every 3 days or so. I'm assuming because it sucks all the nutrients out of the water. Has anyone rooted roses, or even mini roses in a fish tank before? I don't want to kill my fish but I need to be careful as I have dogs and try to stick with plants that are not toxic to dogs, which are few. The pothos plant is up high.