Bubbleking which size

[neeper]

I've got a Red Sea S500 135g (119 display with 16g sump), I currently have the Bubble King Mini 200 but it seems like it's oversized as it doesn't hold a constant foam head; overskims intermittently. I'm looking to downgrade a bit, should I get the mini 160 or mini 180?

 

[Blue Ring Octopus]

The classic Bubble King 180, maybe the 160.