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Wellis Crystal all-in-one water care

WellisCrystal is an environmentally friendly water care system, that can be used in your spa or hot tub. Wellis Crystal will help you to keep the water in your spa clean in a safe, simple and effective way. With only one weekly treatment Wellis Crystal will help you to prevent calcium deposits in your system. Moreover. Wellis Crystal will loosen and remove the existing calcium deposits. These calcium deposits are the medium where bacteria and other micro-organisms grow. The UV-C system already in your spa, will do the rest. It will destroy the bacteria and disinfect the water.


With extraordinary results: the water in your spa is not only clean, but also looks crystal clear and feels nice and soft.


Contents of our Wellis Crystal 3 months, All-In-One Package 2 bottles of Wellis Water treatment 1 dispenser for chlorine tablet Chlorine tablets 90/20 (18 parts) I measuring cup 200 ml I microfibre cleaning cloth User guide




Instructions for Wellis Crystal with a NEW spa


Ensure your spa is always clean. In order to do so, use Wellis Crystal SpaCleaner. To prevent residual / test water from a new spa contaminating the water, clean the spa before use as detailed below:


a) Fill the spa with tap water.

b) Add 0.5 liter of Wellis Crystal SpaCleaner to the spa’s water.

c) Make sure all jet nozzles are open and switch the pumps on at the highest level for 15 minutes.

d) Leave the water in the spa overnight.

e) Repeat step c.

f) Let the water drain and flush with clean tap water. Let this last water drain as well.

g) Fill the spa with clean tap water and re-install the cleaned or a new filter.

h) Make sure the pH value always ranges between 7.2 and 7.4.

i) Apply the chlorine dosage unit with the chlorine tab on the filter unit and heat your spa to the temperature requested (38 °C).

j) Start treating the water with Wellis Crystal All-in-One as specified in the respective instructions.

k) The night before refilling is scheduled (approx. every 3 months), start the procedure with step a.


Tipp: check you spa water’s pH value every 3 weeks.



Instructions for Wellis Crystal with USED spas


a) Add 0.5 liter of Wellis Crystal SpaCleaner to the spa’s water the night before you plan to refill it.

b) Make sure all jet nozzles are open and switch the pumps on at the highest level for 15 minutes.

c) Leave the water in the spa overnight.

d) Repeat step b.

e) Let the water drain and flush with clean tap water. Let this last water drain as well.

f) Remove the filter and clean it with Wellis Crystal FilterCleaner*.

g) Fill the spa with clean tap water and re-install the cleaned or a new filter.

h) Make sure the pH value always ranges between 7.2 and 7.4.

i) Apply the chlorine dosage unit with the chlorine tab on the filter unit and heat your spa to the temperature requested (38 °C).

j) Start treating the water with Wellis Crystal All-in-One as specified in the respective instructions.

k) The night before refilling is scheduled (each 3 months), start the procedure with step a.


Tipp: check you spa water’s pH value every 3 weeks.


* Instructions for the FilterCleaner:  - Sprinkle 2 scoops of Wellis Crystal Filtercleaner over the filter.  - Place the filter into a bucket.  - Fill the bucket with hot water.  - Leave the filter in there for 1 to 1.5 hours to soak (turn filter around every once in a while).  - Rinse the filter with a water jet and re-install it with the spa.


You can order the Wellis Crystal chemical package at our Wellis Online Store.

Find out more about Hot Tub draining/cleaning and maintenance here.

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