Can you use ocean water primarily salt in a hot tub?

No, it is not recommended to use ocean water primarily salt in a hot tub. Here's why:

1. Salt imbalance: Ocean water contains a high concentration of salt (sodium chloride), which can alter the chemical balance of the hot tub water. This imbalance can irritate skin, eyes, and hair.

2. Corrosion: The salt in ocean water can also cause corrosion to the surface, components, and plumbing of the hot tub, especially if the tub is made of metal or contains metal parts.

3. Foaming: The high salt content in ocean water can lead to excessive foaming in the hot tub, which can be unpleasant and make it difficult to maintain the proper water chemistry.

4. Mineral deposits: Ocean water also contains various minerals, such as magnesium, calcium, and sulfate, which can form scale and mineral deposits on the hot tub's surfaces and components, leading to decreased efficiency and increased maintenance.

5. Sanitizing issues: Ocean water may not contain sufficient levels of chlorine or other sanitizers to effectively control bacteria and microorganisms in the hot tub, increasing the risk of contamination.

For these reasons, it is generally not advisable to use ocean water primarily in a hot tub. Instead, it is recommended to use fresh water treated with proper hot tub chemicals and sanitizers to ensure the safety and cleanliness of the water and to prevent potential damage to the hot tub equipment.