thanks to all for responses on my questions. the current set up I use is a pair of stainless steel heavy gauge wires attached to an audio cable with crocodile clips and fed into a small mixer. scruffy but it works.
one thing that concerns me slightly is that I know this is a very sensitive fish. can any of the fishy experts out there confirm that this method in no way troubles the creature? in an installation I am putting on very soon the fish will be monitored several hours a day for 3 months - though I aim to an experienced aquarist tending the fish on a regular basis. simon, I couldn't open the link you posted. my browser said the page cannot be found... andy [EMAIL PROTECTED] ------------------------------------------------- ........ h o s t p r o d s d o t n e t ........ =================================================
