Quote:
Originally Posted by Myka
Steve, baffles don't slow the water down, unless you consider the linear compression as slowing it down. 9000 gph is 9000 gph, the only way to slow that down is to make less flow.  Baffles work by forcing the water into a shallow shape...it takes less time for bubbles to rise 1" than to rise 10". |
they do slow it down.. in most cases the actual baggle part of your sump will not allow the bubbles to be released, large ones maybe but not the micro bubbles. and I'll explain why with an example of the sump I built for my last tank.
I use 3 chambers the first is where everything is dumpped, so the water hits the first set of baffles. so now I am taking a large boddy of water with low flow, and forcing into a small body with high flow (throught the baffles) then it opens to another large area so we have a high velocity lamaner flow of water dumping into a large area. this auses the velocity of the water to slow right down, and it is here where you should get your bubbles released. I could go into Pressure changes befor, during and after the baffels but as long as we understand that the water does slow down after it leaves the baffels and dumps into a larger area then were good. my third chamber was just for the pump suctions so all my last set of baffles did was maintan the hight of the water in the middle chamber
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