Redriderno22,
Looking at your page the cell design looks like a Joe cell.
It is a submerged parallel cell which will produce a lot of heat which means a lot of power consumed for the amount of gas produced. Using galvanised pipes creates another problem that being that the cut ends a exposed steel this will cause iron oxide to be released into the system, that is where the red junk is coming from.
The pipes are only 6â€