Is the red knob on the front a plug for adding attachments like say a surface skimmer?

Is the red knob on the front a plug for adding attachments like say a surface skimmer?

Type AquaTop PFE9 Hang-On Filter w/ Surface Skimmer on google and you will see the solution![]()

Are Penn Plax Cascade hob filters available there in the UK? I have a couple of these that are getting close to 5 years old now. Cheap and reliable.


I know of a website where there are quite cheap h.o.b filters but i cant pm yet... so ill have to post more and i cant post the link
ChiefWalksInSlips (29th Jan 2012)
I am new to shrimp but have been keeping fish for 13 years and the aqua clear is the best I have used and I have used a few. But a little mesh on the intake and it's shrimp safe.
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