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Small-Scale Question Sunday for October 16, 2022

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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I was at a beach in the Northeast this weekend, and I'm a basic bitch who listens to Huberman Lab, so I'm getting into cold water immersion. It genuinely seems to up my mood and energy level all day. For home, I want to make an outdoor ice bath. Conceptual inspo here but 1) A tiny bit less stupid and 2) not $1,200 plus shipping.

I'm thinking of starting with something like this from a local feed store, building a little wood frame around it out of pressure treated lumber, then insulating around it and building a little wood-and-foam lid to keep it clean. Fill it from the hose, add a couple bags of ice, and hop in every morning or after a workout.

My question is, to what extent and how can I keep the water over days without it becoming scuzzy and unusable. Obviously over time it will become actually dirty from the sweat and grime of my body, but I'm talking how do I keep stuff from growing in it? Do I use some pool chemicals in low doses? Salt? I don't want to open it up to find Algae everywhere, and I don't want to have to use up 50-60 gallons of water to do it every day.

I can't advise on pool chemicals or salt but what did occur to me is freshening the water. You don't want to use 50-60 gallons daily, but could you partly drain the water and top it up daily? That may let some of the muck out and/or dilute the remaining muck.