In article ,
enigma wrote:

Christine_B wrote in
:

What is the best way to go about cleaning up the pond so as
not to cause any further harm to the remaining wildlife?

if you think cement fell into the pond, first thing to do is
take a pH reading. raw cement is very alkaline & a rapid pH
change will kill fish & other wildlife. it won't do any pond
plants any good either.
i suspect that adjusting the pH (slowly!) back to a more
moderate range will solve your problems.

lee

Sound advice. If high a slow water exchange may be in order. Something
like 20 % every other day. Increase aerating if possible.

Good Luck!

Bill

--
Garden in shade zone 5 S Jersey USA

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