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Old 06/27/2005, 08:06 PM
Anthony Calfo Anthony Calfo is offline
Parapterois heterura
Join Date: Nov 2001
Location: Pennsylvania
Posts: 5,141
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
lots of pics of various horizontal overflows
Selecting corals to hide internal overflow 11.14.05
internal versus external choice 11.9.05
nice pics and modification suggestions 11.6.05
siphon overflow driving the box? Avoid this. 10.26.05
images of acrylic post-prod horizontal overflow 10.16.05
images of internal horizontal overflow
external horizontal overflow 8.22.05
Dampening overflow sound/noise: modification
CL loop and internal horizontal overflow 7.24.05

above added 6/27/05
"If you give a man a fish, he eats for a day... but if you teach a man to fish, he eats for a lifetime."

Last edited by Anthony Calfo; 11/30/2005 at 10:23 PM.

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