I use also use humic acid just like my friend the cheif , and it stains the roots brown. Next week I will run a cycle of uc roots thru and it will clean up again . This is part of a twin 10 bucket system . I use heavy 16 full line with hormex ,roots excel , cal mag , uc roots , pro tect. It’s a fully automated remote online controlled system , using igrow master controller ...................... Airwalker 16 there is always room to improve I will be the first to admit that i don’t know everything and if I did then I would be out on some other post off subject and criticizing...also that’s what I call a “service bucket “its a bucket attached to cart that has power and clean uc roots in it . The product can be placed there to do maintainace on its home bucket and if need be can stay awhile. This style of AG is not my favorite this time of year I like the indoor then equinox then outside for going big. ......And here is a pic of the poor sickly plant living off those roots