Hot Tub Chemicals Guide
Explore our Hot Tub Chemicals Guide and find out everything you need to know from recommended chemical dosage amounts to chemical how-to guides.
Hot Tub Chemicals Quick Start Guide
Setting up your hot tub for the first time? Start enjoying your hot tub in just three easy steps.
1. Shock Dose - Add Commissioning or Normal Shock Dose of Chlorine
After filling with water and before using your hot tub, shock dosing the water in your Lay-Z-Spa kills any bacteria from the start. It will also help to extend the time until you have to replace the water (assuming a good chemical maintenance schedule). Find out how to shock dose your hot tub in our Shock Dosing How-to Guide below.
2. Test Water After 24 Hours
After a commissioning shock dose, you usually have to wait around 24 hours before the water is safe to use.
It is essential to test the water every time before getting in. When it comes to water testing, we recommend using Clearwater 3 way Dip Test Strips. Using Clearwater Dip Test Strips, you are able to quickly and accurately assess your spa’s water conditions and make adjustments to the chemical levels as required.
This may require you to adjust your pH, Alkaline and Chlorine levels. Dosage amounts will vary.
3. Start Your Regular Ongoing Chemical Regime
In order to maintain clear, clean and healthy hot tub water there are some Daily, Weekly and Monthly Chemical Tasks that you will need to undertake.
Daily, Weekly & Monthly Chemical Care
Explore our daily, weekly, monthly and ad-hoc hot tub chemical duties and caring information.
1. Keep Your Lay-Z-Spa on
Turn on your Lay-Z-Spa and activate the filtration system to ensure your spa stays continuously filtered. We recommend the spa is filtered for a minimum of 4 hours a day.
By leaving your spa on the filter cartridge will collect suspended dirt and oils. This, together with chemical water treatment will help you maintain clean and healthy water.
2. Test Chemical Levels before use
If your chlorine, alkalinity or pH levels are not correct, please refer to our chemical How To guides below
3. Check Filter Cartridge
It is advised that filter cartridges are changed or cleaned after every use of. If the spa has not been used, the filter should be checked when the chemicals are tested daily.
How to clean your hot tub filter:
1. Ensure your pump is switched off
2. Remove the filter housing from your liner including the backplate
3. Unscrew the filter housing and remove the cartridge.
4. Wash off the cartridge with a garden hose or cool tap water and leave to dry. Do not use any detergent or washing-up liquid to clean the filter.
5. Replace the cartridge with either a new or clean and dry one in the spa. Do not use a wet filter cartridge as this will not clean the spa effectively.
Every week there are a number of recommended activities you should carry out in order to prolong the life of your Lay-Z-Spa’s water.
Hot tubs are smaller than pools and are shared by more people, meaning a greater amount of contaminants are brought into the water. As a result, it’s recommended that you give a shock treatment to the water once a week during periods of heavy use. Find out how to do this in our Shock Dosing Guide below. During periods of less heavy use, the spa will not need to be shocked as regularly. After shocking, test the water with a Clearwater 3 Way Dip Test use Clarifier to ensure the clarity of the water.
ClearWater Clarifier contains flocculants that bind small particles of debris and algae together making it easier for your Lay-Z-Spa’s filtration system to capture and filter algae in the spa’s water.
Every month you will need to carry out the following to maintain water hygiene:
Replace The Water
The frequency of water changes should reflect the degree of use of the hot tub, as well as the results of chemical testing. If chemical levels have fallen far outside the normal ranges, it is recommended that the water is completely replaced and re-treated.
Some chemicals will need to be added depending on chemical reactions in the spa.
We always recommend that you shower before entering your hot tub. This is to reduce residue from products such as shampoo, deodorant, washing detergent, sun lotion, moisturiser, make-up, fake tan and natural body oils which can cause chemical imbalances. Despite showering we understand that these substances are still sometimes present and will react with the water resulting in foam being produced. In order to resolve, prevent and control this we would recommend that you add Clearwater Foam Remover to your spa.
Water Problem-Solving Chart
Find out the causes and solutions to water issues your hot tub may be experiencing.
Water issues may seem like a difficult task to resolve, but by using our Water Problem Solving Chart below you can easily identify the causes and remedy.
|Green / cloudy water / slippery sides||Inadequate sanitiser. Algae may be present||Shock dose with chlorine (see shock dose table) and add foam remover or clarifier.|
|Too much chlorine||Overdose|
1. Drain spa to minimum mark and re-fill with fresh water to maximum mark, this will help to dilute the excess chemical.
2. Remove the cover from spa to allow evaporation of the chemical (keep the spa filter running constantly).
|PH hard to control||Alkalinity low||Add Total Alkalinity Increaser – see packaging for dosage information|
|Can't maintain chlorine levels||Chlorine demand of water too high at start up, after holidays or due to excess contamination or neglect|
|Cloudy water||Poor chemical control or inadequate filtration||Clean or replace the filter cartridge, check chemical levels using ClearWater Dip Test Strips. Adjust if necessary (chlorine/PH). If the problem persists buy a clarifier to remove small particles.|
|Rough pool sides / edges||Scale formation due to high calcium levels in water||Ensure PH levels are correct using ClearWater Dip Test Strips.|
|No colour change on test strip dip test||Too high chlorine leading to bleaching of indicator pads (over 15ppm chlorine)||Check the expiry date on ClearWater Dip Test Strips. Wait for chlorine level to drop and re-test.|
|Foaming||Detergent present from incorrect cleaning products or excessive algaecide use||Reduce water level and top up with fresh water. Avoid domestic Household cleaners. You can also use Clearwater Foam Remover if the problem persists.|
Chemical Handling & Storage
Ensuring yours and others’ safety when handling chemicals is highly important as failure to do so could cause serious harm or death. Please therefore read the below instructions carefully on how to correctly store and handle chemicals.
Read Instructions Thoroughly On Each Product Before Use
Never use unlabelled chemicals and please read the instructions before use. Avoid getting chemicals in eyes, on skin or on clothing. Avoid breathing vapours when opening a container. Avoid creation of dust. Never add water to the product. Always add product to large quantities of water. Use separate clean dry utensils for each chemical and clean after use. Do not add the product to any dispensing device containing residuals of other products.
Wear Protective Clothing
When you’re ready to begin mixing your chemicals, you should handle them with chemical resistant gloves. The glove material has to be impermeable and resistant to the product/ the substance/ the preparation. It is also advised to wear tightly sealed goggles and appropriate protective clothing such as long sleeves, trousers, and closed-toed shoes that fully protect your feet from spills. You should also wash your hands after handling chemicals.
Spillages & Disposal
In the event of spillage, clean up using clean receptacles and dispose of carefully. Do not add water to spilled materials. Do not use floor sweeping compounds to clean up spills. Sweep and scoop spilled material into clean, dedicated equipment.
Every attempt should be made to avoid mixing spilled material with other chemicals or debris when cleaning up. Do not attempt to reseal any contaminated drums. Do not transport wet or damp material.
Adding Or Pre-Dissolving Chemicals
Always pre-dissolve chemicals in a clean, plastic container in a well-ventilated area. When pre-dissolving chemicals always add chemicals to water and not vice versa. Always add the chemicals to the water.
Never mix different chemicals in concentrated forms. This includes the kit products but also with other products like bleach or weedkillers – a dangerous reaction may occur.
Do not eat, drink or smoke when using this product. Have a First Aid Kit available for any accidents
- If inhaled: Seek fresh air and keep at rest in a position comfortable for breathing.
- If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention.
- If swallowed: Get medical advice/attention or call a poison centre.
For general safety advice on using your Lay-Z-Spa or chemicals, please refer your manuals.
Store in a secure, cool and dry place. Chemicals must be kept well away from children and pets. Always keep chemicals in original packaging.
Avoid Exposure to Sunlight and Humidity
When considering where to store your chemicals, the best storage locations are areas out of direct sunlight. Chemicals react poorly when in contact with sunshine and heat and require a dark, cool environment to control for any potential reactions.
Make sure that any outdoor storage of chemicals is as far away from your hot tub as possible and in a dry, covered area. Humidity or even small amounts of water can cause chemical reactions that could lead to dangerous fumes.
Provide Plenty of Ventilation
Choose a location with ample ventilation for storing your chemicals. In areas with little airflow, dangerous fumes can quickly accumulate if chemicals do start to react. Ventilation is even more important when multiple chemicals are stored in close proximity to each other, as certain chemicals may create a hazardous reaction when combined.
Be Attentive to How You Store Different Chemicals
Refrain from stacking different chemicals on top of each other as this is not advised. Storing chemicals requires careful attention to the product label instructions for each individual product. Material Data Safety Sheets (MSDS) are provided with each chemical product upon purchase and should be referenced with care. Keep in mind to never store oxidizers and acids close to each other.
Take care to never store any chemicals on the floor or above your head. This reduces the risk of items falling or spilling. In addition, avoid stacking liquid chemicals above powdered ones due to the risk of a hazardous reaction.
Keep Chemicals Away From Flammable Items
Outdoor storage areas for your hot tub chemicals should be situated away from anything flammable. Keep any petrol-powered equipment, like your lawnmower, in a different location. The storage area should also be away from sources of heat, like an outdoor fire pit or BBQ.
Do Not Reuse or Switch Container
Reusing chemical containers or transferring chemicals to another container is never recommended as it can be hazardous. When storing your chemicals, always use the original containers with their labels clearly legible. Each container was designed for the specific storage requirements of the chemical it contains.
Even if you’re handling the same type of chemical, mixing a new batch of a chemical with a leftover batch of the same chemical can lead to a reaction from the older residue, or create fumes.
Chemicals & What They Do
Explore this list of ClearWater chemicals including their key properties and uses.
ClearWater is our chosen and recommended chemical provider. Developed with Lay-Z-Spa in mind, the range of ClearWater Chemicals includes everything needed to make sure your spa’s water stays safe, clean and clear. Explore the table below which includes each product’s use and function.
|CHEMICAL OR ACCESSORY||FORM||FUNCTION|
|Clearwater Chlorine Granules||Granules||Clearwater Chlorine Granules are one of our most popular products and are considered an essential item in every hot tub owner’s tool kit. Chlorine granules disinfect the spa water by killing bacteria which builds up in your Lay-Z-Spa. They are quick dissolving and relatively pH neutral.|
|Clearwater Dip Test Strips||Strip||Clearwater Dip Test Strips are a quick, easy but essential way to check the chlorine, pH and alkalinity levels of your spa water, allowing you to provide it with the right treatment if necessary. Untested water can develop a chemical imbalance which may result in an unhygienic swimming environment or skin irritations. Simply dip a test strip into your hot tub water, quickly remove it and allow the colour to develop. The results can be checked against the colour chart provided, indicating each level.|
|Clearwater Mini Multifunction Tablets||Tablet||Clearwater Mini Multifunctional Tablets are an effective and hassle-free way of maintaining clear and healthy spa water. They contain a combination of chemicals that act in a number of ways. These slow-release tablets contain chlorine, algaecide and water clarifier. The chemical dispenser slowly releases the mini-tablets into the water, making this a completely hassle-free way of treating your water even for the user with a busy schedule.|
|5-inch Chemical Floater||Chemical Tablet Dispenser||The 5 Inch Chemical Floater slowly releases Clearwater Mini Multifunctional Tablets or Chlorine Tablets, making it the perfect accessory for busy spa users who want a hassle-free way of maintaining clear and healthy spa water. The dispenser has an adjustable dial which controls the release of the 20g tablets, ensuring that the sanitizer level of your spa water is consistently and efficiently maintained. Compatible with all spa models.|
|Clearwater pH Plus||Granules||Clearwater pH Plus, also known as ‘pH increaser’ is the best way to increase pH levels that have dropped below the recommended level. To avoid skin discomforts and enable the chlorine in your spa to work effectively, it’s vital that acidity is monitored and controlled. The recommended pH balance of spa water is between 7.2 and 7.6.|
|Clearwater pH Minus||Granules||Clearwater pH Minus, also known as ‘pH reducer’ is the most simple and effective way to decrease the pH of your spa water when it has surpassed the recommended level.|
|Clearwater Clarifier||Liquid||Clearwater Clarifier contains flocculants which bind small particles of debris and algae together so that your Lay-Z-Spa filtration system can adequately remove them, resulting in clean and sparkly water. This is a very effective way of preventing your spa water from looking dull and cloudy, due to the build-up of dead algae and debris that is too small to be trapped by your filter. Even if you have treated your spa for algae using Clearwater Algaecide, it is recommended that you use the Water Clarifier to remove any residual debris.|
|Clearwater Algaecide||Liquid||Clearwater Algaecide is the quickest and most effective way to eliminate and prevent the build-up of algae, which provides an ideal breeding ground for germs and bacteria.|
|Clearwater Foam Remover||Liquid||Clearwater Foam Remover is designed to control and prevent foaming in your hot tub, which is typically caused by the reaction of water with shampoos, deodorants and natural body oils present on the user.|
|Scale and Stain Remover||Liquid||Clearwater Scale and Stain Remover is great for hard water areas.|
|Chem connect||Chemical tablet dispenser||The chem connect attaches to the top debris screen on the liner of the spa. It slowly releases clearwater tablets. The dispenser has an adjustable dial which can control the release. Please remove the chem connect when the spa is being used. Compatible with spas made in 2019 onwards.|
Looking for Chemicals?
We stock a wide range of ClearWater Chemicals all specially designed for use with Lay-Z-Spa hot tubs.
Need Advice on Hot Tub Maintenance?
Visit our Lay-Z-Spa FAQs and get advice on looking after your hot tub, chemical maintenance and more.
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