Usually has an adapter fitting,instead of or with spray bar,its a tiny pump by the way not really any use for filtering tne water,more for disturbing water surface to add more oxygen.
Is it for that tank i saw if so its no bloody use to you or the fishes!
When its fully immersed try shaking it to dislodge airbubbles,cos if its got a new sponge in it they tend to trap a lot of air bubbles.
It is for that one, not as the only pump though. It was only to get a bit more oxygen in there. Just emailed them again and they've emailed the instructions.
Just followed the instructions and had to get changed as it drenched me
The Flugelhorn tube thing had to go outside of the water, not under it
On the plus side, it works
Cheers guys - you're all fabulous!!