18
Hot tub care
b) Depending on the frequency of use of the hot tub, test the water quality regularly
by a suitable water quality tester.
c) Adjust the water pH level accordingly by suitable water chemicals
(the HANSCRAFT SPA – pH PLUS and pH MINUS is recommended).
d) Adjust the Cl (chlorine) level with suitable water chemicals (HANSCRAFT SPA
– MULTI MINI 3 in 1 tablets are recommended). Follow the instructions on the
chemicals‘ label.
For the chlorine to have the desired effect, the pH level needs to be
adjusted first.
e) We recommend you to clean/replace the filter cartridge before adding the chemicals.
Chlorine shock – in case of extreme pollution, it is necessary to treat the water with
a dose of fast dissolving chlorine and thus perform a chlorine shock. The pH level of
the hot tub water has to be adjusted to 7.0 –7.6 first and the chlorine level has to be
checked. Once a week or after adding a large amount of fresh water to the hot tub,
add a shock dose of chlorine 10 –20 g/m
3
(2 table spoons) into the water. Add the
chlorine only when there are no people in the hot tub. After you add the chlorine, turn
on the circulation pumps so that the chemicals mix well with the water. If you are using
a granulated form of the chemical, dissolve it in a small amount of water first. Let the
chlorine level drop to 3 mg/l before you start using the hot tub.
Oxygen shock – in case of extreme pollution, it is necessary to treat the water with a
large dose of fast dissolving oxygen and thus perform an oxygen shock. The pH level
of the hot tub water has to be adjusted to 7.0–7.6 first and the oxygen concentration
in the water has to be checked. Once a week or after adding a large amount of fresh
water to the hot tub, add a shock dose of oxygen (2 tablets) into the water. Add the
oxygen only when there are no people in the hot tub. After you add the oxygen, turn
on the circulation pumps so that the chemicals mix well with the water. Let the oxygen
level drop to 15 mg/l before you start using the hot tub.
Store the chemicals according to the instructions on the label.
Ideal chemical levels
Free chlorine concentration
(active oxygen concentration)
0.7–1.0 mg/l
(10–15 mg/l)
pH level
7.0–7.6
Calcium
100–180 mg/l
Overall alkalinity
80–120 mg/l
Summary of Contents for IN.K300
Page 1: ...USER MANUAL IN K300 ...
Page 23: ...23 Notes ...
