| There is also the issue of voltage leaks with submersible pumps. While this is generally not a serious problem for larger koi, fry can possibly be adversly affected. It has been suggested that crooked tails on fry can result from this. It is easy enough to check for voltage in the water using a voltage meter on the low AC scale. Stick one probe to ground and the other in the water and see if you get a reading. I found two fry tanks that had readings of nearly 9 volts this year and some of the fry in both tanks were experiencing crooked tails. It was not enough that you could feel a shock. Gounding the water appeared to stop the problem.
Mitch |