Cut through the glass slowly with the diamond bit on the tool.

Another variation again on the light moving system, this time using an airpump to drive it.

Method of minimising gurgling in a sump when have a stand pipe.

Another variation of the light moving system.

Simplification of the light moving system, using only one pump.

Refinement of the water flow control for the light moving system, allowing finer control of the movement of the light across the tank.

Idea for a simple and cheap light moving system.

Stockman style standpipe: hole in the 80 mm end cap and pipe to fit over the 50 mm piping.

Stockman style standpipe: the stand pipe before modifcation.