Internal Horizontal Overflow
 

we are beginning a collection of links to internal and external horizontal overflows - design, plumbing, photos, etc.

As the list of links grows... do remember to read to/through some of the older entries. Some great matter there, as these entries are sorted merely by date.

The short summary of principal benefits to an internal weir to mask/capture the drilled overflow holes for a display-sump loop:

- it concentrates the quality of surface overflow water by capturing more proteins via an extended weir rather than allowing less concentrated ("thicker" water) to simply plow through a large, unrestricted pipe opening (see Book of Coral Propagation, Volume 1 and the RC archives for a more detailed description)

- a slight, extended floor (lip) to the internal style horizontal overflow offers an easy pace to store frags or settle with invertebrates that grow to cover and hide this filtration aspect

- an external horizontal overflow is quiet and discreet, while taking up no more space behind the tank than any of a number of other common add-ons (HOB skimmer, HOB fuge, powerfilters, etc.)

- a horizontal overflow is generally regarded as less unsightly and less cumbersome than a vertical overflow tower which takes up precious floor space for the display/rockscape... as well as violating the first rule of water holding vessels: never drill a hole in the floor ;)

[url]http://archive.reefcentral.com/forums/showthread.php?s=&threadid=473152&highlight=calfo[/url]
lots of pics of various horizontal overflows

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=6093283#post6093283[/url]
Selecting corals to hide internal overflow 11.14.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=6064592#post6064592[/url]
internal versus external choice 11.9.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&threadid=473152&highlight=calfo[/url]
nice pics and modification suggestions 11.6.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=5983068#post5983068[/url]
siphon overflow driving the box? Avoid this. 10.26.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&threadid=690015[/url]
images of acrylic post-prod horizontal overflow 10.16.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&threadid=473152&highlight=Calfo+style+overflow[/url]
images of internal horizontal overflow

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=5565249#post5565249[/url]
external horizontal overflow 8.22.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=5545672#post5545672[/url]
Dampening overflow sound/noise: modification

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=5377082#post5377082[/url]
CL loop and internal horizontal overflow 7.24.05

[url]http://archive.reefcentral.com/forums/showthread.php?s=&threadid=619904[/url]

[url]http://archive.reefcentral.com/forums/showthread.php?s=&postid=5208549#post5208549[/url]

above added 6/27/05