Ive only ever tried bennies and always failed.
I tried once with roots excel, roots were amazing white but the system failed. The next go i failed as high res temps, i wasnt using EWC i was adding a benifical bacteria powder similar to great white to the system which didnt seem to save the plants but the temps were top 80's. Then i made the tea wrong, i followed the recipie but i brewed at only 60oF and the bennies didnt wake and eat the mollasses, so when i added it into the system i caused myself the problems..
The last attempt, i am sure it was adding too much bennie powder as the roots were rotted when leaving the rockwall and a little slimey roots in the water, i think adding too much powder to the roots every few days caused it. I didnt use any tea, just a very strong mix of benifical poweder...
I am having one more attempted sticking to the RichRich/Heisenburg recipe, brew exactly as they say with the exact ingredients. I have a UV sterilizer on the water butt, the water comes out the RO filter into the water butt and a pump recirculates the water into a large 36w UV sterilizer for a few days before adding into the RDWC system
So this is my last go at bennies, then its going to be the HTH pool shock...