<< In a 600 gallon pond, you can always do a series of water
changes to reduce nutrient levels too. >>
Ah, but my tap water contains phosphates (Total phosphate (mg/L): 0.38)
That may rule that out. I will remove it and see if eventually I can exhaust
it. Or I could refill it with RO water (not likely at a 10 gal/day output
rate). It may well be due the lack of rain which caused me to top it off from
the tap water.
Lee Harper
Media, PA
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