SpaBoss Cal-Rise is completely soluble in water and easily raises the calcium hardness level in your hot tub a capful at a time. Testing your spa or hot tub water regularly will help you keep an eye on this very important part of healthy, clean water. Your hot tub can be damaged with corroded metal surfaces such as pipes, filters, screws, lights, and other hot tub hardware that is in contact with water that has a calcium hardness level below the recommended range. Increasing calcium hardness when it drops too low is critical to a working hot tub that is always ready for you to use.
- Test hot tub water for total hardness. Spread SpaBoss Cal-Rise over the surface of water by the capful: 1 oz is about 1 capful.
|if the total hardness reading is:||Add this much Cal-Rise per 250 gallons of spa water:|
|0 - 20 ppm||9 ounces|
|40 ppm||7 ounces|
|80 ppm||6 ounces|
|120 ppm||4 ounces|
|160 ppm||3 ounces|
|180 ppm||2 ounces|
|200 - 300 ppm||Ideal Conditions|
Shipping and Delivery
Free shipping is available to the Continental United States. Orders typically ship within 1-2 business days. If order happens to be backordered (which is very rare), it will ship within 5-10 business days. If you need something shipped faster, please contact us and we will do our best to accommodate.
All orders are charged at the time of order. Next-day/two-day shipping, orders must be received prior to 3:00pm CST (and will not be processed on Saturdays, Sundays or Holidays.)
Returns & Replacements
Orders must be returned unused and within 30 Days of Receipt. At time of receipt of returned order, you will receive a refund less the restocking fee.
Restocking Policy: Selecting replacement parts and filters can be difficult, so you will never be charged a re-stocking fee if you call or email to ensure you are placing the correct order. Customers are responsible for paying the shipping costs on all parts that are returned due to incorrect ordering. A 20% restocking fee will apply on a case-by-case basis.
Please fill out the return order form on the back of your original packing slip when returning parts. Parts should be returned to:
Master Spa Parts, Inc.
2140 W Wisconsin Avenue
Appleton WI 54914
Free shipping is not available on International Shipments (including AK and HI). Customers shipping outside the continental United States are responsible for any additional duties and taxes depending on shipment location and cost of goods.
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