I’m being pedantic here, but stainless steel still has iron in it. The addition of chromium forms an oxide layer on the surface that prevents rust. If the body is rusting, that means they used a shitty grade of stainless. Stainless with an appropriate amount of chromium (and nickel) is expensive as fuck.

Also, we had one acting similarly a couple years back. We thought it was a smoked pump, but it wound up being a sticky solenoid. It’d be in that gray box on the top right in your photo. Wound up being a pretty simple fix.

We have a bunch of these Denison presses in various sizes at my job; used mostly for clipping and bending. They do damn good work, but any parts that can’t be sourced from McMaster are getting near impossible to find. Anything we can’t make in house normally gets pulled from spares in the warehouse, and we’ve since moved towards building our own presses. It’s a shame, since the cast iron on these will last forever.

Watched this a while ago. Super cool tank, and an awesome new fishtuber. Makes me want to build a tank for my desk.