Note. typing fopa.
Wes, You can drain the box faster than you can fill it. When the box drains faster than it can fill it brings the level down to the point at which it sucks air. When air is being sucked in it slows the rate of drain giving the flow into the box a chance to catch up. Once the box submerges the pipe again it will drain all water and no air making it drain at a faster rate again. If you have a pump to closely match the drain then you wont have to restrict the drain much at all. My drain passed a full size Starry Blenny and is quiet. Did you try the experiment i suggested?
Wes, You can drain the box faster than you can fill it. When the box drains faster than it can fill it brings the level down to the point at which it sucks air. When air is being sucked in it slows the rate of drain giving the flow into the box a chance to catch up. Once the box submerges the pipe again it will drain all water and no air making it drain at a faster rate again. If you have a pump to closely match the drain then you wont have to restrict the drain much at all. My drain passed a full size Starry Blenny and is quiet. Did you try the experiment i suggested?