Hello
currently i use lithium chlorine (spa product that does not smell) and the solution is filtred with a water cartrige (5 microns) once or twice a month.
The Epsom salt is a hard crystaline environemt for bacteries.
I have check a litle bit for u.v light for in order to be effective the water has to pass slow enought.
So for me a prefert lithium chlorine ( kills bacteries).
Antonio
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