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6 Hot Tub Chemicals You Should Always Have

September 7th, 2017 by

If you are like most spa owners, you have more than 6 spa chemicals on hand, and like most of us, there is a larger collection of various spa chemicals, including sanitizers, balancers, clarifiers, cleaners and other specialty chemicals.

Every spa is different in terms of what is needed for proper and optimum water chemistry. Things like spa use frequency, number of users, cleanliness of users, filter size and effectiveness, pump run times, fill water quality and factors like sun, wind and rain can all call for different spa chemicals, at different times.

However, there exists a core set of spa chemicals that a hot tub owner should always keep in stock, because they are used more often than others. You will need other spa chemicals from time to time, to adjust water balance to proper ranges, or to control other water conditions, but keep a good stock of the basic inventory.

 


SANITIZERS

Every spa needs a means of controlling the ABC’s – algae, bacteria and contaminants, on a daily basis. When hot tubs first came on the scene, everyone used bromine tablets as the primary sanitizer. Bromine tablets are used with a bromine booster, to build up a bank of bromide ions, which can be easily regenerated by simply adding a shock oxidizer to the spa.

Many spas are outfitted with ozonators, which allow for much lower levels of bromine, or you can use a spa mineral stick to accomplish pretty much the same thing. Frog has two popular bromine+minerals floating sanitizers, the traditional Spa Frog floating system and the new round flip-floater, called @ease.

Chlorine tablets are not used as a spa sanitizer, because they dissolve too slowly, and lower pH and raise cyanuric acid levels, however Spa 56 by Leisure Time is a popular granulated chlorine that dissolves quickly and maintains a chlorine residual for 5-7 days.

SHOCK

Spa shock is in a class of chemicals known as oxidizers, because they will oxidize contaminants in the water, pipes and filter. Even though spa water may be clear, there exists at any given time, various ABC’s and other particles and byproducts that reduce sanitizer and filter effectiveness. Spa shocks destroy everything in the water, both inert particles and pathogenic organisms.

Shock your spa after each use, or every 7-10 days, whichever comes first. Shocking regularly is important to kill bacteria that may have escaped your daily sanitizer, and reduce build-up of oils, soap, skin, dust and other particles that enter the spa naturally. You can use chlorine spa shock or non-chlorine spa shock (MPS), they are both very effective.

CLARIFIER

Spa Clarifiers are positively charged polymers that are strongly attracted to negatively charge particles, which make water cloudy. They work by forming large clumps of very small particles, those that would normally pass right through your spa filter, making them easy for your filter to trap.

Clarifiers like Bright & Clear make the water more pure by removing dissolved solids, which increases the effectiveness of your sanitizers and shock. This in turn, makes your spa water last longer, increasing the length of time between water changes. Leisure Time’s  Protect Plus also adds a stain & scale additive, and Rendezvous’ Natural Clear adds an enzyme to remove oils and soaps from spa water.

pH DECREASER

At any given time, you may need either pH increaser -or- pH decreaser, but most people need the latter. Spas and hot tubs are small bodies of water, and with regular use, pH tends to rise in most spas. When pH rises above 7.8, sanitizers become less effective, and scale can form more easily. High pH is also a better breeding ground for algae and bacteria.

pH should be maintained in the 7.2-7.6 range, just slightly basic. If you are having trouble adjusting your pH, or if pH is very erratic, changing fast and often, test the Total Alkalinity of the spa water. 80-120 ppm is best, to provide a buffer for the pH level, helping it to remain steady for longer periods. Add Alkalinity increaser if below 80 ppm, and use pH decreaser to lower alkalinity levels in excess of 120 ppm.

COVER CONDITIONER

This one doesn’t need a long explanation, other than if you regularly condition the marine grade vinyl on your spa cover – it will look better, stay cleaner and last longer. Clean your spa cover first with a mild dish soap and a dish sponge to clean surfaces.

After drying, apply the spa cover conditioner to seal and protect the vinyl from rain, dirt, snow and sun. Regular use can add years to your cover lifespan by preventing breakdown and tears in the outer vinyl surfaces.

FILTER CLEANER

Hosing clean your spa filter gets most of the big stuff, but it won’t easily remove oils and mineral scale, which clog up the pores of spa filter cartridges. In such cases, the water pressure can push oil and minerals deeper into the fabric fibers, contributing to early failure.

Spa filter cleaners gently lift oils and mineral scale with a combination of mild acids and degreasers, like Rendezvous Filter Fresh or Leisure Time Filter Clean. Just soak your cartridge in a bucket or pail of water with the recommended amount of filter cleaner added, or use our own spray-on filter cleaner and let it sit for a few minutes, before rinsing clean.

 


 

As mentioned above, you may need other hot tub chemicals from time to time, but these are what I call the core set of chemicals – those that are needed most often, which are also (coincidentally) the most popular spa chemicals, or those that are purchased most often. I hope this was helpful!

 

 

XOXO;

Gina Galvin

 

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