I'm going to redo my girlfriend's tank in a couple of weeks; partly to replace the Tetra Complete substrate, which is all over the place, and partly to clear out a moderate BGA infestation. I'm going to add pressurised CO2, decent substrate (probably EcoComplete), plant heavily, improve the flow and start dosing EI. My question is whether it's worth trying to "kill" the BGA that's in there? Would washing it with brine help? Or should I just accept that I can't kill it as such and trust that the improved regime will sort it out?