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Bio Ouster3in1 Weekly Cold Plunge Water Treatment is a professional-grade, septic-safe liquid formula that cleans, clarifies, and softens cold plunge water. Designed for all types of cold plunges, it ensures crystal clear, fresh water with weekly dosing. Made in the USA, the 32oz bottle provides up to 32 treatments, offering long-lasting, economical maintenance without the need to drain your plunge.




| Product Dimensions | 7.62 x 7.62 x 22.86 cm; 1.01 kg |
| Item model number | OS-PCL-32 |
| Item Form | Liquid |
| Colour | Clear |
| Number of Items | 1 |
| Quantity | 1 |
| Batteries required | No |
| Batteries Included | No |
| Item Weight | 1.01 kg |
A**R
Easy simple water treatment and clarity
Easy and simple to use, straight forward instructions and dosing, great value as once initial dose is done periodically topping up required, good size last and water clarity and smell is great
H**.
Not enough on its own and caused problems after a few days
I spent 40 euro on this thinking it would keep my cold plunge clean and safe. At first the water looked clear but after three days I started to notice itching on my skin every time I got out. That is when I learned this product is only a clarifier and softener. It does not sanitize the water. The label says you still need to buy a separate sanitizer such as chlorine or bromine. So on top of the 40 euro already spent I now have to spend more money elsewhere to make the plunge usable. It might help with water clarity but it is not a full solution and it gave me skin irritation after a short time. If you want a safe cold plunge you will need to add a real sanitizer.
F**Y
awesome product I cannot believe how much longer my water lasted by adding this product. Everything was crystal clear for months. I will definitely buy again when I'm out of this product. Should last me a long time.
W**T
This product works great! I’ve been using it in my cold plunge and it really helps keep the water fresh, clean, clear, with no odor. Super easy to use just add it in weekly and it does the job. I love that it’s a 3-in-1 treatment, which saves time and makes maintenance simple. Definitely recommend if you want to keep your plunge water looking and feeling great! Came wrapped up securely no leaks. Good price. Size last us all month in our cold plunge.
D**T
Does exactly what it says. I add a few oz’s to my cold plunge weekly and water is always nice and clean
H**.
This product works great. My cold plunge water stays clear all month long. It does not stain my tub my skin or anything else.
A**M
Works well for cold plunge water and helps keep it clean and clear. Overall, I’m happy with this water treatment.
Trustpilot
3 days ago
1 week ago