26
It is easier to raise the chemical levels, but more difficult to lower them without draining/diluting
the spa. However, high levels of hardness associated with hard water may be countered by regular
treatment with Rotospa scale inhibitor. Alternatively, use a Pure stream Pre-Filter (available from
https://www.rotospa.co.uk/shop/
)
when filling the spa, ensuring you adhere to the instructions.
Adjusting for Water Balance
If the pH of your spa water is above 7.6, then use Rotospa pH minus to reduce it, using the instructions
on the container. If the pH is below 7.2, then use Rotospa pH plus to increase it, again adhering to
the instructions. If TA or hardness are below 80 and/or 100 respectively, then use Rotospa spa
alkalinity increaser and/or Rotospa spa Hardness increaser to raise.
Also be aware that continued use of the hydro jets where the air control(s) are turned on, will cause
the pH to naturally rise, so always ensure these are turned off when you are not using the spa.
Foam Control
Foam appearing on the surface of the water can be unsightly. Due to warmer spa water, the build-
up of foam agents from bodily oils, cosmetics etc, can sometimes exceed the spa filter cartridge’s
ability to remove them. In such cases an easy remedy is available using Rotospa FoamAway, dosed
as below for effective foam control.
Cleaning and Maintenance
Periodic cleaning of waterline grease using Rotospa Surface Cleaner will not only help your spa look
good but will also optimise the use of your chemicals and help to reduce the time in which your filter
cartridge becomes dirty.
Always use Rotospa cleaning products as household products often contain detergents that cause
foam.
High pH
High TA
High Hardness
7.2-7.4 IDEAL pH
Low Ph
Low TA
Low Hardness
Risk of…
>Skin/eye irritation
>scale formation
>reduces effectiveness of chlorine
Risk of…
>Equipment corrosion, especially metals
>unpleasant odours and bather discomfort
>chlorine used up rapidly
DOSE
SPA VOLUME
Initial dose 100ml 1000 litres/220 gallons
Weekly dose 50 ml 1000 litres/220 gallons
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