I hope you're checking your pH & KH. pH crashes are notorious in areas
with high rainfall. ~ jan

Here in New Orleans, it rains nearly every day. Sometime between 11AM and
5PM it clouds up, gets dark, the lightening flashes, and pours for about an
hour. Then the sun comes out and we're back to humidity and sunshine. The
pond overflows and the fishies love it. I haven't done a water change in
months. Michael Fermanis

See my ponds and filter design:
http://users.owt.com/jjspond/

~Keep 'em Wet!~
Tri-Cities WA Zone 7a
To e-mail see website