Hot Tub and Spa Maintenance: Keep the Water Clean and Clear

A hot tub holds a small volume of hot water that bathers use intensely — which means chemistry shifts fast and needs more frequent attention than a pool. Four habits keep it clean, clear, and safe: test weekly, rinse the filter, shock after use, and refresh the water seasonally.

How often should I test hot tub water?

Test water chemistry at least weekly — more with heavy use. Hot water and a small volume mean pH, sanitizer (chlorine or bromine), and alkalinity drift quickly, and unbalanced water gets cloudy, scaly, or unsafe fast. Regular testing and small adjustments keep it stable, which is far easier than rescuing neglected water.

How do I clean a hot tub filter?

Rinse the filter cartridge every few weeks under a hose to clear trapped oils, hair, and debris, and do a deeper chemical soak periodically. A clogged filter can't keep the water clear no matter how balanced the chemistry is. Replace the cartridge when it's worn — clean filtration is half of clean water.

What does "shocking" the water do?

Shock the water after heavy use (or weekly) — adding an oxidizer clears out the organic contaminants (sweat, oils, lotions) that bathers leave behind and that normal sanitizer can't keep up with. Shocking after a party or heavy soak prevents cloudy, smelly water and keeps the sanitizer working.

How often should I drain and refill a hot tub?

Drain and refill every three to four months. Over time, dissolved solids build up to the point where you can't balance the water no matter what you add. A full drain, a quick clean of the shell and a flush of the lines, and fresh water resets everything. Trying to chemical your way around old water is a losing battle.

Track water care

Logging test readings and your drain/refill dates keeps the spa healthy. Okoniq Property Hub keeps it with your home maintenance records in one private place.

Frequently asked questions

Why is my hot tub water cloudy?

Usually unbalanced chemistry, a dirty filter, or built-up contaminants needing a shock — or old water that's due for a drain and refill. Work through those in order.

Chlorine or bromine for a hot tub?

Both work; bromine is more stable in hot water and gentler on skin/odor for many people, while chlorine is cheaper and faster-acting. Pick one and stay consistent.

Okoniq Property Hub helps homeowners and small landlords keep maintenance, bills, and contractor info in one calm place. Get started free.