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As the plant grows and used the nutrients in the solution, the chemistry of
that remaining in the reservoir changes. The pH also changes due to that and the gas exchange occurring at the root system. By filling the pot to the top with fresh nutrient solution at every watering, you saturate the medium, clean out the reservoir, and refresh the entire system. I find that doing that precludes the need for a monthly fresh-water flush altogether. -- Ray Barkalow - First Rays Orchids - www.firstrays.com Plants, Supplies, Books, Artwork, and Lots of Free Info! .. "RPM1" wrote in message ... "Ray" typed: Ruth, It's important to flush the reservoir when you water, and not just top it up. Thanks Ray. Do I need to flush the containers every time or can I go with my usual once a month fresh water flush? What am I trying to remove with a reservoir flush? TIA Ruth CM |
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