Plug for Freshwater™ Salt Sytem Utopia Filter Don't leave the bottle in

Don't leave the bottle in a hot sauna

The Tropic Seas Spas™ Tonga 35 Sq Ft

The Caldera Spas® Utopia Series Pillow / Headrest 2016+ fits the following Caldera Spas® Utopia Series hot tubs:

keep the phosphate level in your hot tub below 300ppb

Plug for Freshwater™ Salt Sytem Utopia Filter Don't leave the bottle inYou know that thing that looked like a defective salt cartridge and came with your new Freshwater salt system hot tub that you misplaced or threw out? That's called the Freshwater Salt System Plug and you need it! It's purpose is to keep air out of the Freshwater Salt System. You need the Freshwater Salt System Plug in a few situations: 1. If you ever move your hot tub. Before you move your hot tub, take out the salt cartridge and put the plug in. 2.