Spa filters work by capturing debris from the water passed through them.
Simply stated, filters with large surface areas collect more debris. Large filters reduce the number of impurities and particles that are pumped back into the spa's water. As you're shopping for a spa, ask your salesperson about the size of filter used in the spa, and how that size relates to other spas on the market.
Some spas come with more than one filter. While their areas combined may be the same size as one larger filter, you'll have to clean more than one filter, so make sure filters are easy to access and remove.
Try to choose a spa with filters that are easy to access for periodic maintenance.
Filtration Cycles and Circulation Pumps
The amount of water that passes through a spa's plumbing is one of the true tests of a filtration system. It is important that all of the water in the spa is filtered several times each day. Of course, this is most important when you need it the most: when you're sitting inside the spa.
Many spas come with pre-programmed filter cycles. Depending upon the price of the spa and the complexity of its internal control system , you may be able to program your own cycles, or choose one of several pre-set cycles. These cycles determine the number of times per day your filtration cycles will activate and the length of each cycle.
During a filtration cycle, the jets in your spa will turn on, and water will be rapidly pushed through the filter. Filtration cycles are generally set depending upon "bather load," (a measurement of how often you use your spa).
Make sure to inquire about filtration cycles. How often is all the water filtered? Remember that filtration is a gradual process. If the spa you're considering holds 250 gallons of water, it is important that the spa can filter at least 10,000 gallons of water per day!
Many spas offer circulation pumps. A circulation pump keeps a small amount of water moving through your filter continuously - day and night. While circulation pumps do not work alone, they are effective in helping to keep your water clean and clear because they prevent standing water. In conjunction with powerful filtration cycles, they can help ensure that your water is adequately filtered all day long.
Ozonators
Many spas come with the option of Ozonators for enhanced water purification. Ozonators offer two benefits to the spa user:
- Reduced use of chemicals
- Clean, clear water with less maintenance.
What is Ozone?
Ozone has been used in water treatment since the late 18th century. Ozone (O3) is a naturally occurring form of oxygen; this is a form of oxygen in which each molecule contains three atoms instead of the normal two. Ozone occurs naturally in small amounts in the Earth's stratosphere, where it absorbs ultraviolet radiation. Although it resembles oxygen in many respects, ozone is much more reactive. Because it can decolorize many substances, it is used commercially as a bleaching agent for organic compounds, as a strong germicide for the sterilization of drinking water and to remove objectionable odors and flavors.
How is Ozone Created for Hot Tub Use?
Ozone is manufactured in hot tubs in two ways. Some Ozonators, known as UV Ozonators, use an Ultraviolet light bulb to create ozone. Others, known as CD Ozonators use a safe electrical discharge passed through oxygen. The resulting mixture of ozone is injected into the water, and impurities are oxidized. The creation of ozone through this method is the most current and effective way of producing ozone in a hot tub.
Choosing a Complete Ozone System
Because ozone has a distinct smell, it is important to choose an ozone system with an "off-gassing" component. The best systems use ozone injectors, which push ozone into the water, and then agitate the mixture for optimal oxidation of unwanted particles and impurities. Next, the water/ozone mixture is pushed through an off-gassing chamber, where the ozone dissipates. This procedure allows ozone units to work constantly, even while you're sitting in the hot tub, without the nuisance of ozone gas smell.
Reaping the Rewards of Ozone
Because ozone acts as a powerful oxidant, it serves as a water purifier. This means that using ozone to clean your spa's water reduces the amount of chemicals required to kill standing bacteria and impurities. By installing an ozone system, you will save money and time related to water maintenance. Additionally, because ozone acts as a bleaching agent, you should experience water that looks crisp and clear reducing the need for chemicals.
Does the spa have an Ozonator? What kind is it?
Look at shop page for the plasma ozone
Your hot tub purchase should include an insulated cover in the basic sale price. A hot tub cover serves several important functions including:
- Preventing heat loss
- Keeping leaves and other debris from the water
- Preventing weather damage to the top of the spa.
- Keeping children and pets out.
When you're shopping, consider the following features of a cover:
Safety Requirements: Hot tub covers should meet safety requirements for static load (amount of weight the cover can withstand), perimeter deflection (prevention of objects passing between the cover and the side of the hot tub), and other requirements, such as labeling, fastening, and surface drainage. The American Society for Testing and Materials (ATSM) sets these standards.
Be certain that any cover you buy is ASTM approved.
Vinyl: Your hot tub cover should be treated with mildew and UV inhibitors, to withstand constant attack from the elements, and the water inside the tub. The bottom side vinyl must also be constructed to withstand wear from hot tub chemicals.
Be sure that the vinyl on your cover can withstand wear and tear from weather and spa chemicals.
Foam Core: Spa covers are usually priced based on the density of their foam cores. Density generally ranges from 1 lb. to 4 lb. This foam serves as insulation, to keep your hot tub water's heat from escaping when the hot tub is not in use. A good cover will have a tapered foam core that allows for run-off of excess water. The foam should also be lightweight, so you'll have less trouble lifting the cover.
Look for high-density insulation, weight and provision for water run-off.
Heat Seal Gaskets and Hinges: Hot tub covers fold, and this is often where heat is lost. Your cover should include gaskets that seal the two halves of the cover when it is closed. Your cover should also have reinforced hinges, to handle its weight when folded and unfolded.
Look for good gaskets and hinges.
- Locking Hardware: A hot tub cover should meet the ASTM's standards for locking safety. Locks are often modeled after the quick-release buttons found on sports equipment and should lock individually with a key provided.
Look for ASTM approved locking standards.
Hot tub Cover Lifting Devices
Well-insulated spa covers, by nature of their design, are heavy. Many consumers opt to buy a cover-lifting device to assist with placement and removal of the cover. There are a many kinds of lifting devices. The most common use a metal bar in the fold of the cover, with a handle for leverage. After the cover is folded, the handle is lifted upward, and the cover hangs on the back of the spa. When you're shopping for a cover-lifting device, consider the following:
- How is the device attached to the spa? It's best to choose a lifter that uses heavy gauge hardware, rather than chains or small brackets to hold the cover.
- Do you have enough clearance? A lifting device lifts the cover over the top of the spa. If you have a roof overhang or a gazebo, you may not have enough clearance to properly use the device.
- What materials were used to build the lifter? A good lifter should be light and sturdy, with well-treated rust-free materials.
- Does the device offer the assistance you need? Lifters may include gas shocks, or even foot pedals to ease the removal and placement of your cover. Test the lifter in the dealer's showroom. Can you easily remove the cover without assistance? If not, look for another lifter.
