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Hi Mike,
Thank you for the warm welcome and explanation. Maybe i'm a newcomer on this forum but certainly no newcomer in the hobby. I'm keeping koi for over twelve years by now. One of the pioneers in the Netherlands.
Due to a lack of space it will be inpossilble for me to use a RO-unit. The gardens in the Netherlands are simply to small. I can't storrage large amounts of water waiting for being used. I do a lott of waterchanges. I follow the scedule that JR once gave me. Together with a good and large filtersytems i thought it was enough to reduce TDS to acceptable levels. I was wrong. The tapwater is just to hard. So i'm looking for a way to make this tapwater a lott softer.
I agree about your concerns when using ozone. But i know what it takes to use ozone in a safe way. Never had any problems. So ozone to me is a wonderfull addition to my main filtersystems.
John
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