I think you have done an admirable job. I'm sure glad you did the gold and black sand mix at the end. I was hoping to see that. What did you use for the center tube? I'm looking into making a blue bowl too as it isn't rocket science.
Good job! I did find the gold to be unusually large for what I normally find in black sand. It may be that you needed to be sure that it was visible. I wonder if you could test it for us using sand with gold as it is found naturally?
Why do most DIY Blue Bowls only have one water exhaust into the bowl itself...would it not benefit to have multiple exhausts creating a better turn in the water...noticing how even in the BB, a lot of the classified piles up just prior to the exhaust. having three exhausts equally space all from the same hole would stop this issue
blue bowl make mistake Chen they make connus in the midle you repeet the same mistake.look at my creation I don't luse gold and can put a lot of Sand gold stays . And another problem is to big bowl weather lysing pressure and gold can't stay in the bowl.my bowl just 6 inch wide