Just wondering if any suggestions can be given for metal contamination from a push/pull done in a 304 grade stainless tank. It seemed to have made things green to start with, and when lye is added during initial processing, it turns from green to black. Then, it becomes an impossibility to pull anything out. The non polar solvent of choice is camp fuel (Recochem, distilled), and quality bulk purchaced NaOH to bring the ph up. I am assuming the green reaction is probably some of the nickle that has leeched its way out. Does this contamination 'kill' the gogo, or is there still hope? I have unsuccessfully attempted TFSE.