@wintermute - This thread has been extraordinarily valuable, thank you for all of the information! I have a few follow-up questions now that you've had this setup for over a year.
- Are you still relying solely on H2O2 for sanitation? How often do you change your water and filters?
- If you added an additional sanitation option, would you go with ozone or UV? Based on my informal research, 66% of commercial cold plunges rely on ozone, (+ spa chemicals) 16% on UV, (+ spa chemicals) and 16% on spa chemicals alone.
- If you went with ozone, would you 1. use a JED 303 and drill a hole in the cooler lid, or 2. install inline with a venturi injector?
- Why did you go with a 4.5" filter housing vs. the cheaper 2.5" filter housing?
- Why did you use PVC fittings instead of barbed hose fittings + clamps?
- The Grizzly 450 has two drain holes, one on either side of the cooler. Would you recommend using both of these existing holes for supply/return, or still drilling a hole higher up on the cooler wall and installing a bulkhead?