Just a heads up from a fellow BRS reactor user. occasionally check the first chamber wit the GFO in there. it tends to slow down after a few days to where the GFO doesnt tumble anymore, which is no bueno. so every couple days i would open the valve all the way for like 2 seconds just to turn everything really well in the chamber then reset the ball valve to the appropriate setting so the GFO tumbles again. its a small problem with those reactors running in series like that. but can easily be fixed by opening the ball valve to get circulation in there again....
i eventually got tired of this and split the reactors so they run independently off the same pump now...