Mate it's our own choice what we keep for the table but as a kid we used to see that massive factory at the Silverwater bridge at night shooting flames. Now with age I know it can never be cleaned up. I won't eat any bottom feeding fish west of the big bridge, but have caught some stonkers and big catches from Gladesville area. That's just my choice, but the thought that big lizard or bream may have been up in the silt upriver makes it an easy choice for me. I do think the lower harbour is looking cleaner then ever though. Sorry to offend