Microbacter7 Dosing To Shared Sump

[Mfield16]

I've been daily dosing MB7 to my sump return section and just realized the directions say not to dose to intake ports. I had been doing this to disburse it between 3 tanks that share the sump. One of those is my main display tank upstairs above the sump.

So knowing this now, where would you all dose MB7?

Main display tank?
Frag tank that's the closest to the sump?
Third smaller tank?
Or keep doing it right into the return section?

 

[AV corals]

When I needed to stabilize my nutrients with MB7 and battled Dino. I dosed 5ml right into my display near the center which is where I have the most water movement.