[Macflurry]

I just grabbed a set like this for £25 which worked well enough for me:

https://www.ebay.co.uk/itm/New-Motor...item3ad1d74868

Just needed the little t-pieces after so you can restrict the pipes as much or as little as you like.

https://www.ebay.co.uk/itm/Fish-Tank-Aquarium-Plastic-T-Shape-3-Way-Hose-Air-Line-Tubing-Control-Connectors/142953302161?hash=item2148ae4891:m:m1Z54rIq7W81gJ6-hYR5BLQ:rk:20f:0

Here's mine in use:

https://youtu.be/LqJftfd6Crw
https://youtu.be/LqJftfd6Crw