CR140 reactor
5lb co2 tank
Aquatic life reg
Feed via manifold off my RF Dart return pump with ball valve
Controlled VIA Archon with pH probe in reactor
Effluent controlled with pvc needle valve from usplastic
Media used is TLF Reborn and BW mag media
As far as clogging, the needle valve is a bit more prone. I check the outflow and make minor tweaks. Occasionally I will open it wide open into a container to clear the lines out. Stays pretty consistent overall though.
If I had money to throw at it, there are some crazy lab grade peristaltic pumps that people use for feed. I haven't really noticed any inconsistency with the manifold though.
Here's and older pic, it's on the LHS