Bill I think it has to do with the air in fish pellets. whistle

Sorry couldn't resist. blush

Is it possible when they sense dropping D.O., they start moving to find higher D.O., and when they sense the slightest increase due to diffusion, they move in that direction?

Last edited by Cecil Baird1; 01/08/13 10:06 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.