We have been advised by the retailer that sold us the swim spa to use the O-Care liquid additive once a week to keep the water "safe, soft and simple". This is a product from the Netherlands with no details as to its ingredients. It is also very expensive (which might explain the retailer's recommendation for its use). O-Care is added in addition to all of the standard spa chemicals (bromine, shock, PH balance, etc.). Does anyone use this product or understand what it actually does? I have spoken to some spa guys with a lot of experience and they say that it is an unnecessary additive but do not know the product. Any ideas?
