Pools, Hot Tubs & Spas · Accessories & Add-ons
Pool Chemicals & Testing: What Else You'll Need
By the Nest & Yard editorial teamUpdated 2026-08-093 min read
Our pick: the Clearwater 1 kg Multifunction Chlorine Tablets, 4-in-1 Dispenser Tablets (Sanitiser, Stabiliser, Algaecide and Clarifier) for Pools and Hot Tubs, 50 x 20 g, White — the best Pool Chemicals & Testing we tested, from £15.99.
Maintaining a sparkling pool requires more than just chemicals – ensuring everything works effectively and safely demands careful consideration of the supporting accessories you’ll need. This guide explores the essential add-ons often overlooked when setting up your pool care routine, covering items like cable management solutions, secure mounting options, and replacement parts to keep your equipment running smoothly. From protective cases for sensitive chemicals to specialist tools, we'll highlight the crucial additions that contribute to a hassle-free and properly maintained aquatic space.
See the full range in Pool Chemicals & Testing.

#1 Pick
Clearwater 1 kg Multifunction Chlorine Tablets, 4-in-1 Dispenser Tablets (Sanitiser, Stabiliser, Algaecide and Clarifier) for Pools and Hot Tubs, 50 x 20 g, White£15.99
Pros
- 4-in-1 formula sanitises, stabilises, and clarifies in one tablet
- Slow-release 20g tablets last 3-5 days per dose
- Trusted, best-selling brand with a huge review base
Cons
- Floating dispenser sold separately

#2 Pick
Clearwater Hot Tub Chemical Starter Kit, Includes Chlorine Granules and Dip Test StripsCurrently unavailable
Pros
- Bundles chlorine granules with dip test strips for a complete starter routine
- Trusted Clearwater formula widely used across UK hot tubs
- Simple to dose correctly even for first-time spa owners
Cons
- Ongoing top-ups need to be bought separately once the kit runs out

#3 Pick
Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment for Rapid Disinfecting and Cleaning, 1 kgCurrently unavailable
Pros
- Fast-dissolving granules give rapid disinfection after shock dosing
- Stabilised formula for free active chlorine that lasts
- Simple dosage guide included on the tub
Cons
- Granules need diluting before adding to avoid bleaching liners

#4 Pick
Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment, Jerry Can, 5 kgCurrently unavailable
Pros
- Large 5kg jerry can lasts a full season for most pools
- Fast-dissolving formula gives rapid disinfection
- Easy-pour dosage guide printed on the can
Cons
- Bulkier to store than smaller 1kg tubs
FAQ
I've just bought some pool chemicals – what other accessories should I consider?
Alongside the chemicals, you’ll likely want a test kit to monitor pH and chlorine levels regularly. Additionally, a bucket with a pouring spout is essential for accurately measuring out doses, and a telescopic handle can be useful for dispensing chemicals from a distance.
What's typically included in a new pool chemical set?
Most sets include a bottle of chlorine tablets or granules, pH increaser/decreaser solutions, and sometimes a small test strip pack. However, you’ll almost certainly need to purchase separate test kits and measuring equipment like a graduated cylinder.
I'm worried about splashing when I add chemicals – what can help?
A splash guard designed for pool chemicals is highly recommended; these prevent accidental splashes and protect your eyes. Alternatively, pouring directly into the water slowly with a steady hand is crucial to minimize mess.
Do I need any special equipment for accurately measuring out chemicals?
While you can use a standard measuring cup, a graduated cylinder or scoop will provide significantly more accurate measurements, particularly when dealing with smaller quantities of pH adjusters. This ensures correct dosing and prevents imbalances.
What kind of storage should I use for my pool chemicals?
Store your chemicals in a cool, dry place away from direct sunlight and heat – this will prolong their shelf life. A dedicated cabinet or shed is ideal to protect them from the elements.
I've noticed some chemical sets don’t include a test strip holder - do I need one?
Test strip holders are incredibly useful for neatly storing your test strips and preventing them from getting damaged or lost, ensuring you can easily track water quality trends.
What’s the best way to clean my pool equipment after use?
Use a dedicated pool brush and a mild cleaning solution to scrub the filter basket and other components. Rinse thoroughly with clean water before storing them to prevent algae growth.
Should I buy a separate pH meter or are test strips sufficient?
Test strips offer a quick and easy way to get an initial reading, but a digital pH meter provides much more precise measurements – crucial for fine-tuning your pool's chemistry.
I’m concerned about damaging my pool chemicals - what can I do?
Always handle chemicals with care, avoiding spills and direct contact. Store them securely in their original packaging to prevent breakage or leakage.
What happens if a chemical arrives damaged?
Refer to Amazon's standard returns policy for guidance on damaged items - check the product description for any specific instructions regarding reporting damage.
In depth
Let’s be realistic – the initial purchase of pool chemicals often focuses on the core products themselves. However, maintaining optimal water quality requires more than just adding chlorine and adjusting pH levels. A truly effective approach involves considering a range of supplementary consumables and tools that frequently get overlooked in the early stages of planning.
Firstly, accurate measurement is paramount. While some chemical kits include dosing bottles, these are rarely perfectly calibrated. Investing in a set of graduated measuring cylinders – various sizes from 50ml to 250ml would be highly practical – ensures precise additions and prevents over- or under-dosing, which can both negatively impact water chemistry. Don’t underestimate the value of accurate measurement; it’s the foundation of balanced water.
Beyond individual chemicals, maintaining a stable environment is crucial. A quality test kit, capable of measuring Total Alkalinity, pH, Chlorine levels and even hardness, is an absolute necessity. Digital models offer greater precision than traditional liquid reagent strips, though both require regular use to monitor trends and react appropriately. Alongside the test kit, consider investing in a small laboratory notebook – a dedicated space for recording readings, adjustments made, and any observed changes in water clarity or equipment performance. Consistency of record-keeping is key for troubleshooting potential issues.
Then there’s the element of filtration maintenance. Many pool filters require regular cleaning or backwashing to maintain their efficiency. Stocking up on appropriate filter cleaner – specifically formulated for your type of filter system (sand, cartridge, or diatomaceous earth) – along with spare filter cartridges if applicable, is a wise investment. Regularly inspecting and addressing minor issues proactively prevents more significant problems later in the season.
Don’t forget the basics of equipment upkeep. Pool pumps require lubrication to ensure smooth operation and prevent premature wear and tear. A small supply of appropriate pump oil, designed for marine or submersible applications, combined with a pool-specific wrench set for accessing maintenance points, will prove invaluable. Similarly, skimmer baskets fill quickly, necessitating frequent emptying – having several sturdy collection containers on hand is essential for efficient cleaning.
Finally, consider the long-term effects of water treatment. Stabilizers like cyanuric acid are often added to protect chlorine from sunlight degradation, but these deplete over time and require replenishment. Alongside your chemical supplies, keep a close eye on stabilizer levels and factor in regular additions based on pool usage and weather conditions. Regularly cleaning the surface of the pool with appropriate algaecide is also key to preventing unsightly build-ups and maintaining water clarity – ensure you have a sufficient supply readily available.
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-09.