I use hydrogen peroxide (3%) in with either feed/water, but as i was perpetual growing ( i was never able to totally rid myself of the wee fkrs.) , so after this run im shutting down for a couple of weeks, months - whatever it takes .! I have a friend who’s gonna continue my grow at their place , so not ALL bad.
And cheers for having a look, my plants are just starting to throw some pistils now
( flipped them on March 1st ).