how much poisin is too much ? I know what you say about trace elements and all but he had bown slime or cyano-bacteria.
if no signs of return it sounds good. if you tried your water and it works like my bro's then good use it. But otherwise how do you know whatis in it ?
That's why I learned the hard way to start clean and add the good stuff back . like some Olivia's cloning solution or clonex solution. you can even addsome of the clonex gell to the water to help.
I add to 5 gallon cloner. 6ml of boost and grow from technaflora and a bit of root 66.
However it works well with just R/O water. what I have found as far as cloning is that everyone must keep trying till you find your sweet spot. don't give up cause I have seen some wierd shit that works.