I'm looking to set up a makeshift gunge tank soon for a self gunging. Any ideas what I could use over the bath to suspend and release the gunge? Or how to build something cheap to use in a paddling pool? I need to be sat on a seat underneath and plan to dispose of the tank after use. Thanks.

Easiest was a bucket with a round hole cut in it. Plug the hole with a partially inflated balloon with a string tied to it. Pull string to release. Probably as cheap as you can do!

This looks very good! How would you suspend it over a bath or a paddling pool? I'm guessing some sort of frame/ shelving unit is needed? Currently I can tie a carrier bag to the top of my shower but a whole bucket I feel would be too heavy for this. I definitely want to use a whole bucket of gunge though!

This topic has come up a few times before. I recommend that you go to Google and search for:
build tank site:umd.net

Here's a recent discussion:
https://umd.net/forums/best-way-to-build-gunge-tank-in-shower

The key point to emphasise is that you need a strong structure to support the weight of the bucket. If you sit underneath a heavy object, then it falls on top of you, you could end up with a broken neck (i.e. paralysed or killed).

Realistically, if it's strong enough to be safe, you probably won't want to chuck it away after a single use (and vice-versa).

Please be careful. I've seen so many ramshackle contraptions in photos and videos on here.