| http://www.w3.org/ns/prov#value | - However, substances in the water cannot be removed except by plants [but only when plant growth is heavy with very minimal fish load] and water changes. i realize some low-tech planted tank authors recommend few or no water changes, but that is not my thinking and with 20 years of doing major water changes in heavily-planted tanks, I have seen no detrimental plant growth resulting from the water c
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