Your coil would benefit from the dosing just as much as their towers. They work the same way, the only difference shape.Diameter. I'd use an intake prefilter of sorts.
Probiotics are aerobic so use oxygen when they complete their activities.
I plan on doing a coil at some point lol. Will see how it works
Seems there are 2 distinct directions on this thread:
1- The carbon dosing guys
2- Me trying to figure out the coils lol