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Salt Water Chlorination in Hot Tubs


The SALT WATER system is best used in soft water areas. If you live in a hard water area, you need to ensure a zero calcium level in your hot tub. If you refill or top up with hard water, your SALT WATER system will not work properly and may give you incorrect readings. Reputable companies do not recommend the SALT WATER unit in hard water areas, and will charge for warranty call outs if hard water is used in spas that have a SALT WATER system installed.

It will cost you £30 every 3 months when you refill your spa to remove the calcium by purchasing a calcium removing bag!


For the Salt Water System to work correctly there must be next to no calcium in 
your spa water, this means every time you refill or top up your water you 
will need to use a calcium removing bag which costs £29.99, you must 
always wash the bag before use.
 Please keep the salt level between 750-1500ppm.
 Change the water every 3 months in line with BISHTA guidelines.
 Every 30 days you need to confirm the level of use.
 After refilling every three months the spa will need chlorine granules added 
    for the first 3 days until you add the salt on day 3 to start the Ace System 
 Test every couple of days with the salt test strips and continue to monitor 
     and adjust total hardness / alkalinity, pH and salt level using the salt test 
 From time to time you may need to add chlorine if your use is greater 
     than the salt cells ability to produce chlorine (such as a party).
 Every month, or more regularly if needed, you need to soak/clean the salt 
     cell in pH reducer (acid) to remove impurities,
if this is not done you will get 
     incorrect readings which may lead to over application of salt and damage 
     to stainless steel parts.
 Every 2-4 weeks you need to remove the filters and both degrease and 
     pressure wash with an electric powered pressure washer.
 Every 583 days of operation the salt cell will need to be replaced at a 
     current cost of £600 (cell works 4-8 hours in every 24 hours).
 NOTE – sometimes the in spa control head says to add salt, but please 
     check with a salt test strip to confirm levels before doing so.

When you hear commission sales people gushing about salt water chlorinators just ask them to get the instruction book and go through just what they do and what maintenance they need as well as the life expectancy of the unit, ask them to demonstrate how they clean the cells with nasty dangerous acid and also explain that that the salt is still used to make chlorine, as why not just dose directly? Also ask them to guarantee that the rotor of the pumps, and any stainless steel jets trim is all surgical grade 316 and guaranteed against brine ( salt water). When asking these questions you will stretch any commission sales persons beyond their script and very limited knowledge of hot tub salt water systems and why so few use them, while you are asking ask if the sellers company or barns has ever gone bust in UK and check their details at Companies House before asking.

Salt is not the answer. Here are the facts from web site and owners manuals.
This is what Consumers Should Know About Salt Water Sanitizing System for Hot Tubs

Operating instructions that leave more questions than answers , spa salt systems beyond the spiel.

• How does a salt water system generate chlorine?
– An electrode is used to generate high energy ACTIVE OXYGEN from water. The active oxygen can then clean the water without chlorinated or brominated by products. Once the water is clean, the active oxygen produces the chlorine residual as well as ozone, hydrogen peroxide and MPS.

• How long have the more recent salt water chlorine generators been in testing?
– The components of some systems have only been in testing for 2 years.
– The life expectancy of the Electrolytic cell is 14,000 hours (583 days) of operation under normal operating conditions.

• Maintenance -
–Most makes recommends that the cell be cleaned EVERY 3 MONTHS. The cell can be cleaned with an acid without causing harm to the electrodes. Soak the cell in a solution for 10 minutes in acid.. If bubbles continue to come off the cell, change the solution and repeat.

• Warranty – Typically One Year Limited Warranty for low end units.
–The original consumer purchaser, gets  the components
of most salt water sanitizing systems warranted free from defects in materials and
workmanship for ONE YEAR.

• Trouble Shooting – If the water is cloudy?
– If the chlorine is LOW, manually add granular dichloride as needed or initiate the chlorine boost.

• Warning -
– Operating salt water chlorinators without water flow through the cell can cause a build up of FLAMMABLE GAS.
– Spa usage and higher temperatures may require higher chlorine output to maintain proper free available chlorine residuals. Maintaining high salt and chlorine levels above recommended range can contribute to corrosion of pool or spa equipment.

• How much does a CELL costs to replace every 583 days?  £600, not including installation.











Area of coverage hot tubs, disability lifts & swim spas: London, Berkshire, Hampshire, Surrey, Sussex, Kent, Oxfordshire, Wiltshire and Buckinghamshire
We provide full service for hot tubs, disability lifts and Michael Phelps swim spas to cover Bucks, Berkshire, Hampshire, Oxfordshire, Surrey, Sussex, Wiltshire. eg. Windsor, Iver, Datchet, Eton, Wraysbury, Sunninghill, Sunningdale, Winkfield, Ascot, Didcot, Englefield Green, Basingstoke, Binfield, Bracknell, Finchampstead, Wokingham, Warfield, Wargrave, Wallingford, Hare Hatch, Egham, Staines, Chertsey, Windlesham, Virginia Water, Wentworth, Farnham Common, Gerrards Cross, Slough,  Taplow, Maidenhead, Twyford, Reading, Dorney, Holyport, Oakley Green, Marlow, Cookham, Godalming, Fleet, Bourne End, Denham, Fulmer, Stoke Poges, Uxbridge, Hillingdon, Heathrow, Hurley, Hayes, Pingewood, Tadley, Thatcham, Newbury, Theale, West Drayton, Pangbourne, Northwood, Chorleywood, Moor Park, Lightwater, Ruislip, Northolt, Harrow, Pinner, Eastcote, Ealing, Ickenham, Amersham, Chesham, Great Missenden, Beaconsfield, High Wycombe, Stokenchurch, Sonning, Caversham, Henley on Thames, Wokingham, Crowthorne, Earley, Woodley, Earley, Winnersh, Basingstoke, Fleet, Bagshot, Camberley, Petersfield, Whitchurch, Portsmouth, Poole, Southampton, Isle of Wight, Brighton, Andover, Worthing, Farnborough, Thame, Oxford, Bray, Richmond, and Wiltshire (Trowbridge, Salisbury, Swindon, Chippenham, Devizes, Marlborough, Warminster), Kent. Now covering Central London including Mayfair, Belgravia, Kensington, Soho, Marylebone, Bayswater, Maida Vale, Notting Hill, St Johns Wood, Hampstead, Westminster, Knightsbridge and Regents Park



Location: Aqua Hot Tubs, Ladds Garden Centre, Bath Rd, Hare Hatch, Reading, Berkshire RG10 9SB

10 minutes from Junction 8/9 M4 in Berkshire


Hot Tubs Berkshire ~ Hot Tubs Surrey ~ Hot Tubs Hampshire ~ Hot Tubs Oxfordshire ~ Hot Tubs Wiltshire