I have uploaded some pictues into the project pages and described what I have been playing/experimenting with.
I have two questions regarding my series cell.
1. The biggest downfall of this design is the difficulty of collecting the gas. I want to be able to collect the gas and run it through a bubbler so I can do some flow tests and have a play with the hydroxy. Is the best way to do this just to place the cell into a sealed container? Wouldn't all the space inside the container me a little unsafe when the whole thing is full of hydroxy?
2. I got some wierd results when testing the currents and voltages over a different number of cells. Here is a table showing the results I got:

There is a large jump in current when going from six down to five cells (or going from 1.9v per cell to 2.2v). There is also a corresponing jump in production which would be expected with the higher current.
I'm lost here, I though electrolisis began as low as 1.25v, can someone explain why there is a jump in current and production when going from 1.9v to 2.2v?