For people with heart disease, using a spa hot tub carries potential risks. • Patients with coronary heart disease; • Those with a history of arrhythmia or heart failure; • Those who have had a myocardial infarction; • People with pacemakers (must have their device's safety range confirmed by a doctor).

Provided proper maintenance, short-term idle periods generally do not adversely affect the structure of the swim spa tub. The key is to complete the necessary preparatory work before idleness, such as cleaning, draining, and disconnecting the power.

In unclean spa hot tubs, it often causes a skin condition known as "Hot Tub Folliculitis." This infection manifests as folliculitis, rashes, itching, and even pustules, usually appearing within 24 to 48 hours of exposure.

When the swim spa tub activates its jet system or strong water flow, the water is rapidly agitated, drawing in a large amount of air. If substances in the water stabilize these bubbles, they won't burst immediately but will instead gather at the surface, forming foam.

If the swim spa tub has a leak, the water level change often has the following characteristics: • The water level drops significantly faster than normal evaporation • The water level continues to drop even when the tub is turned off • The water level may stop dropping after reaching a certain height (corresponding to the leak point height)

Regular spa hot tubs only maintain water temperature, while hydrotherapy spa hot tubs focus on the combination of water flow and air pressure. If you want to achieve a therapeutic or deep relaxation effect with a spa hot tub, a regular model is difficult to achieve, while a dedicated hydrotherapy spa hot tub is the true hydrotherapy equipment.