At 03:48 PM 7/5/98 -0400, you wrote: >excess light is needed. So, do I put a small incandescent spot back on the >tank <G>? Why not? Try it and see what happens when it's used in conjunction with the MH bulb. -- Richard J. Sexton richard at aquaria_net Bannockburn, Ontario, Canada +1 (613) 473 1719