Comments: Always add EasyChemicals pH Reducer by pre-dissolving it in warm tap water and spreading the solution widely over the entire surface of the spa.
Explanation: Sanitisation kills the micro-organisms which would colonise your spa if left unchecked, turning the water green and cloudy and possibly infecting bathers. Chlorine- and bromine-based sanitisers work by oxidising the contaminating organisms.
If you are using bromine, add one EasyChemicals Bromine Mini Tablets per 1,000 galls via the spa skimmer, or floating dispenser, or the feeder/dispenser fitted to your spa, following the instructions provided with the dispenser. It may take several days adjusting the bromine feeder/dispenser to obtain a free bromine reading of 2 to 4 ppm. A bromine reading may not be obtained on the first day.The amount of free chlorine in your spa should always be between 2 ppm and 4 ppm, even when the spa is not in use.
Comments: Always pre-dissolve EasyChemicals Stabilised Chlorine Granules in warm tap water before adding to the spa, and add the solution near the spa inlet(s) so that the high flow will help disperse the sanitiser.
It's a good idea to add chlorine in the evening instead of the morning, as this can reduce your chemical costs. During the day, chlorine is lost to the UV in the sunlight. Even with stabilised chlorine, losses can be substantial. At night, ALL of the chlorine used is sanitising your spa, and losses are minimal.
EasyChemicals Mini Chlorine or Mini Bromine Tablets should be added via a feeder device or placed carefully in the spa skimmer basket or in a floating dispenser; never put the tablets directly into the spa or allow them to rest on the spa shell surface. The tablets will dissolve at a rate which will depend on water temperature and flow rate.Whether you are using granules or tablets, adjust the dosing frequency to maintain correct chlorine or bromine readings - if you need to raise free chlorine quickly, granules have a more rapid effect.
High chlorine or bromine levels are not usually a problem for spa owners because even stabilised products are consumed as they work. This means that a high level will normally be corrected naturally within a day or two.
Test frequency: Test for free chlorine or bromine daily.
Shock Back to Top
Explanation: The purpose of ‘shocking' or your spa water is to break down chloramines or bromamines. ‘Shocking' is a rather confusing term which is used to describe the process of adding either extra chlorine (superchlorination) by raising the chlorine level above 8 ppm, or by adding a non-chlorine shock agent (eg. potassium monoperoxysulphate or potassium monopersulphate) to ‘burn off' the chloramines or bromamines.
A non-chlorine shock agent acts by releasing oxygen into the water, which essentially serves the same function as shock chlorine. The advantage to using non-chlorine shock in spa pools is that users can enter the water within 15 minutes after shocking. If you are using chlorine-based shock agents, it is wise to wait until the total chlorine reading falls below 5 ppm before entering the spa.
It is important to remember that non-chlorine shock will not kill bacteria or disinfect, while chlorine based shock agents are sanitisers in their own right.
Chloramines and bromamines are formed when your sanitiser combines with organic (nitrogen-containing) compounds introduced into the pool by bathers (in the form of urine, sweat, sunscreen, soaps, hair products and cosmetics) instead of oxidising micro-organisms.
Chloramines are undesirable in your pool because they reduce the effectiveness of chlorine as a sanitiser, because they can irritate the eyes, and because they have a characteristic unpleasant 'swimming pool' smell.
Chloramines can be controlled by ensuring that free chlorine levels are always at least twice as high as combined chlorine, and by keeping combined chlorine below 1 ppm. This is achieved by regularly ‘shocking' or ‘superchlorinating' your pool with non-stabilised EasyChemicals Chlorine Shock Granules 65% to raise free chlorine to around 10 ppm.Bromamines are thought to be reasonably effective sanitisers in their own right, and don't suffer from the same level of odour as chloramines. Nevertheless, it is advisable to shock a bromine based spa regularly to keep free bromine levels within the target range. Use EasyChemicals Non-Chlorine Oxy Shock Granules for shocking a bromine-based spa.
Always pre-dissolve EasyChemicals Chlorine Shock Granules 65% or Non-Chlorine (Oxy) Granules in warm tap water before adding to the pool, and add the solution near the pool water inlet(s) so that the high flow will help disperse the sanitiser.EasyChemicals Chlorine Granules 55% should NOT be used for shock purposes as this will add unnecessarily to stabiliser levels. Mini Chlorine or Mini Bromine Tablets contain lower amounts of stabiliser, but dissolve too slowly to give the desired increase in free chlorine or bromine.
Test frequency: Daily, especially if bathers complain of stinging eyes
Control Water Balance Back to Top
Comments: Total Alkalinity cannot be increased by adding pH Increaser – make sure you use EasyChemicals Total Alkalinity Increaser for this purpose. However, high Total Alkalinity can be reduced by adding EasyChemicals pH Reducer.If you need to reduce the Total Alkalinity, dose the pH Reducer (pH-) by dissolving in warm tap water and dosing daily in one fixed spot in the spa until the correct level is achieved.
Comments: High calcium hardness is not a significant problem unless pH and Total Alkalinity are also high. The best way to lower it is by partial water replacement as described above - the effect of this will be roughly in line with the proportion of the spa pool water replaced.
Comments: There is sufficient stabiliser in EasyChemicals Chlorine Granules 55% and Mini Tablets to provide the cyanuric acid levels required.
Test frequency: Test once or twice a year.
Maintenance Back to Top
A little further maintenance will help keep your spa water free from algae and crystal clear throughout the season.
These problems - algal attack and cloudy water - can be managed by using the EasyChemicals range of algaecides and flocculants.Some physical maintenance is also necessary from time to time. .