(the following text was extracted from the Spa Marvel website)


Spa Marvel is compatible with all hot tubs and traditional spa treatment systems including ozonators, ionizors, ultraviolet, chlorine, bromine, lithium and salt systems.

In rare instances biguanide products, when used with Spa Marvel will turn the water yellow. If this occurs, contact our customer support for assistance at 1-888-400-1772 or at

Similarly, in some instances Sundance Spas' and Jacuzzi's MicroClean disposable filters will not perform properly with Spa Marvel. Spa Marvel's natural sequestering agents can do such a great job that they will cause contaminants in the tub water to block the filters, resulting in cloudy water. This is the same reason that traditional water clarifiers are not recommended for use with these types of filters. If you encounter water quality issues when using a MicroClean filter, please contact our customer support team for assistance at 1-888-400-1772 or at In these situations the use of a replacement cartridge that does not utilize the MicroClean component may be necessary and is available from your professional spa store.

You will spend the same amount of money using Spa Marvel as you will when using traditional spa water treatment systems. Further savings can be realized when you factor in less frequent water changes and the associated heat-up of those water changes, no longer having damaged bathing attire and no more chemical damage to your lid, jets, heaters, jewelry, hair and nail polish. There is a school of thought that soaking in traditional spa-care chemicals may have negative long-term health consequences, on which a price cannot be put.

The same way it is easier to wash grease and butter from your hands in warmer water. Spa Marvel Cleanser will perform better in warmer water rather than in colder water.

Traditional spa treatment products work best at specific water-hardness levels. Spa Marvel will work at any hardness level, and given the choice Spa Marvel prefers softer water over harder water, but it is not a requirement. If your source water is so soft that it is corrosive and damages your heater and seals, then pleaase adjust the hardness using calcium hardness increaser as per your professional spa store's guidelines.

Spa Marvel has a ten year shelf life. One full bottle of Spa Marvel will treat any tub up to 500 gallons (2,000 litres) and will last three months with regular use. Spa Marvel is engineered to account for the fact that tubs do experience evaporation and some degree of spillage through regular use. Keep in mind that if you lost most of your tub water (i.e. a major leak or massive spillage) that Spa Marvel may not last as long as 3 months. Every 3 months simply add another bottle of Spa Marvel.

With Spa Marvel you can often go up to a year without changing your water. You do not need to change it as often as you typically would, as you are not super-saturating the water with all kinds of chemicals on a routine basis and the TDS (Total Dissolved Solids) of the water increases only marginally. For best results do not go over a year without changing the water. Water will wear out after a year and you will have difficulty maintaining the pH.

Use 1 full bottle of Spa MArvel for any tub up to 500 gallons (2,000 litres). The reason is that in smaller tubs, the bather load per volume of water is often greater than it is in the bigger tubs.

At some point you will start to encounter hazy water, pH travel, and the water will lose its "silky" feeling. For best results add 1 full bottle every 3 months.

One bottle of Spa Marvel treats all tubs up to 500 gallons (2,000 litres) for 3 months with regular use. If you had a 1,500 gallons (6,000 litres) tub such as a swim spa, which is 3 times the size recommended for 1 bottle, you need to add 3 bottles for 3 months. In other words, 1 bottle of Spa Marvel will last 1 month in a 1,500 gallons (6,000 litres) tub, and can be added monthly.

Yes. If for example your tub was at a vacation home that you only used 2 months of the year, you can use 2/3 of the bottle of Spa Marvel for 2 months. This formula can also be used if you are planning extremely heavy use of your spa, i.e. if you know that you are having a party a month after filling the spa that will result in such heavy use that a water change will be necessary, use 1/3 of a bottle of Spa Marvel to last for that month. After the party, change the water and use the remaining 2/3 to last another 2 months.

Yes. Spa Marvel is safe for children, pets and birds and does not stain clothes, ruin highlights in hair or harm jewelry or nail polish. Spa Marvel is a product so safe that it does not require warning labels or child-resistant packaging.

Spa Marvel Cleaser is a fast-acting proprietary cleanser that penetrates deep inside of your spa's plumbing and equipment, caustically removing biofilm, organic, mineral and chemical contaminants. In brand new spas, Spa Marvel Cleanser removes residues leftover from the manufacturing process including waxes, oils and resins.

If you do not use the Spa Marvel Cleanser the natural descalers contained within the Spa Marvel Water Treatment and Conditioner will clean out debris from the manufacturing process and accumulation from past use, which may cause water quality issues as a result.

Yes. If the lake water is cloudy due to tannins in the water, you will need to use spa shock and/or a clarifier to help in cleaning it during the first few days.

pH should range from 7.2 to 8.2 (a range broader that required when using traditional spa treatment products). Spa Marvel tubs tend to, more often than not, sit with a pH of 7.2 - 8.2. Alkalinity should range from 80 to 120 ppm. Always adjust alkalinity first, then pH, using products available from your professional spa store.