Maybe someone can advise me. My pond water (2500 gallon pond) has gradually
become greener and greener over the years as the fish load increased. I had
a 100 gallon bio-filter. So I increased the filter by adding another filter
in parallel with the other filter for a total filter size of 450 gallons.
But here's what happened. Within about a week the pond started clearing.
By two weeks it was crystal clear, even in hot weather. I was elated and
could see the fish once again. However, after another two weeks the pond
has turned green again. Terrible disappointment. But the question is: Is
this normal? Can I expect it to cycle back and forth for a while as the new
filter grows more bacteria and then eventually stabilize? Thanks for your
help. Green Bob