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Hi Roddy,
I completely agree with you about the pheromone levels, although I tend to look at TDS levels myself. But then, reduce the TDS using fresh water, and pheromones will be reduced anyway. As for Nitrates... over here, nitrate levels are often higher in fresh water than they are in the pond, so massive water changes push the levels up instead of down. What's the score with mains water nitrates in the States?
I agree with you that JRs $900 a year, is a worthy investmnent!... absolutely!
Best,
Miek.
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