I am using tlf reborn. Works great for me so far, no clogging or any concerns of that nature in the past 9 months.
One thing I highly recommend is a quality peristaltic pump to feed the reactor. You can pick up a master flex pump for pretty cheap these days, and once you have that set up you don't ever have to worry about the effluent rates changing. I tried the different feed pumps and tees off the return line, that was super frustrating!