EddieW
Fish Addict
St. Cichlid,
As mentioned in your other thread, here's a very basic design for a HOB wet/dry filter.
Get your acrylic box and drill three holes in one side, two at the same height and one somewhat higher to allow for the height of the 'dry' area. Then glue two bulkheads in place - one is from the very bottom to about halfway up the lower two holes and the other to higher than the centre of the spray bar but leaving an inch or so (or more) at the bottom.
Fit the piping as shown - add a spacer under the feed pipe to the spray bar to compensate for the difference in height from the returns so that the unit will hang level.
Check it for leaks, connect the pump, put the media in, hang it on and off you go.
Notes:
The filter is designed to pump water out of the tank into the filter and overflow back in. This means that there is less likelihood of the filter epmtying your tank in the event of a power failure. However if the return was to block the pump would cause a major flood, hence the use of two returns. You should also not place the feed pump too low in the water so that it cannot pump your tank dry.
The water level inside the filter will be approx where the blue line is. Adjusting the height of the left hand bulkhead will control the level.
The top of the right hand bulkhead must be below the top of the box to allow for situations where the bio-medai gets blocked and overflows. The size of the gap at the bottom is a personal choice, based on the type of media used, etc.
HTH, Eddie
P.S. Not actually built one of these - it is based on filters I have seen and my own ideas.
As mentioned in your other thread, here's a very basic design for a HOB wet/dry filter.
Get your acrylic box and drill three holes in one side, two at the same height and one somewhat higher to allow for the height of the 'dry' area. Then glue two bulkheads in place - one is from the very bottom to about halfway up the lower two holes and the other to higher than the centre of the spray bar but leaving an inch or so (or more) at the bottom.
Fit the piping as shown - add a spacer under the feed pipe to the spray bar to compensate for the difference in height from the returns so that the unit will hang level.
Check it for leaks, connect the pump, put the media in, hang it on and off you go.
Notes:
The filter is designed to pump water out of the tank into the filter and overflow back in. This means that there is less likelihood of the filter epmtying your tank in the event of a power failure. However if the return was to block the pump would cause a major flood, hence the use of two returns. You should also not place the feed pump too low in the water so that it cannot pump your tank dry.
The water level inside the filter will be approx where the blue line is. Adjusting the height of the left hand bulkhead will control the level.
The top of the right hand bulkhead must be below the top of the box to allow for situations where the bio-medai gets blocked and overflows. The size of the gap at the bottom is a personal choice, based on the type of media used, etc.
HTH, Eddie
P.S. Not actually built one of these - it is based on filters I have seen and my own ideas.
