Since this involves another mod, I'll post the same thing there.
( https://mods.factorio.com/mod/atan-air-scrubbing )

When I put the level three pollution module into a beacon, the Air Scrubbers' max pollution filtering (-100 at legendary) gets reduced by 80% (-20%).

tldr, it probably doesnt take the negative polution into account and subtracts the % of the pollution module?

That's probably for the other mod to fix.

I hope the other modder sees the message, as they havent been around for a while.
fingers crossed

Heya cackling.

It's funny that your other pollution mod (the evil twin) actually buffs the scrubber. With a bit of rethinking, I got it working nicely.
for funzies: https://i.gyazo.com/7fbf962bec91f10629928a88d6383d91.png

That said, would it be possible to allow ElectroMag plants to produce both the Pollution and Pollutions' Evil Twin?

I think that was the idea behind the original request that lead to the evil twin mod. Sure I can add it to the EM plant.

Thanks! factorio-bro-hug

Done.

You, 11/10 person! Thanks so much!