I have a cell set up just as lasersteve shows in his video and it works fine but one thing troubles me. The only drain cleaner i could find doesn't specify the amount of sulfuric acid in it, all it reads is "virgin sulfuric acid and twelve buffers", it is alot darker and a little thicker in viscosity than the drain cleaner steve uses in his video. Will this be a problem when i go to filter and wash the gold out of the acid? anyone have any thoughts? Thanks for your help, Vince