Becketts Foaming Venturi
Nozzle for Oxygenating Water in Fish Ponds
This page shows you a Becketts nozzle which
I have attached to the top of my in-pond
venturi and pump as an experiment after a friend
sent it for me to try out. The pump (a Hozelock Cascade
4000) is being used to power
foaming fountain nozzle and my underwater venturi.
Read on for more information....
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This is a picture of the foamer nozzle before attaching
to the pump. You can see the airholes in the sides which
are used to draw in air by the venturi effect due to
the speed of the water flowing through the unit, which
in turn bubbles air into the water, and so providing
First thing I think is that Beckett made the nozzle
inlet an odd sort of
size (no doubt it is designed
to fit their own pumps). Why couldn't they have made
it more a standard pipe
as you'll see
from the photos after some fiddling I was able to fit
it to the fountain head upright tube on my
Hozelock Cascade fountain which I use for my in-pond
Here is the Becketts nozzle attached to the top of my
Hozelock Cascade 4000 litres per hour 24 volt
white piping is my home
made "tooth" design venturi.
The valves on the sides of the fountain pipe can be used
to adjust the flow between the foaming fountain nozzle
and the venturi.
My friend Dex found
a guy in the states who sells
these foamer jets on Ebay.
Although many pond owners
like these kind of foaming nozzles for use in their ponds, marine
aquarium enthusiasts also
use them for homemade designs of "skimmers".
|A side-note on Skimmers
A skimmer (the technical term is "foam fractionator")
is generally intended for use in marine (saltwater) aquariums,
and commonly uses some kind of foaming nozzle or other device to bubble air through
the water. Its primary use is not as an aerator, but as a means of cleaning the
Due to the proteins and particles present in the salt water the bubbles break
the surface tension of the water and create a fine foam, more so than it would
in fresh water. The fine bubbles float to the surface taking up any other fine
particles, sediment, fish poo etc, and form a foam on the surface of the water
in the skimmer, which traps all the waste particles, and then the dirty foam
overflows via a "skimming" outlet (hence the name skimmer) into a drain
cup or recepticle which can be emptied at regular intervals.
Here is an example of a skimmer used in a
Underworld SeaClone Protein Skimmer
SeaClone 100 Protein Skimmer
The SeaClone is powered by a MaxiJet MP1200
Powerhead (included) and can be used either as
an external 'hang-on' or an 'in-sump' model.
It now comes with new snap fittings for greater
performance, reliability and easier cleaning.
Designed for aquariums up to 455 litres (100
gal). The Overflow Extension is an optional extra
for aquariums with a greater than 25mm (1'')
Source: The Aquarium Shop (UK)
The general conscensus of opinion
however, is that while the Becketts nozzle is ideal for
water, the bubbles it produces are not very small unless
operating under high pressure, and apparently
for skimmers in marine aquariums, the finer the bubbles,
the better will be the foaming ability to float and trap
the waste particles. If you are interested in the Beckett
being used in skimmers, see the Pictures link in the
Resources section below.
The Beckett Corporation is based in the USA, and their
web site at the time of writing can be found at www.888beckett.com however
they do not appear to sell this particular nozzle separately
any longer (only included
with some of their fountain kits). See Resources section
Anyway, here are a couple of shots of the unit once
taken apart to reveal the magic innards that make the
effect, which sucks the air in via the 5mm airholes and
mixes it into the water. Bear in mind that the design
to be used as
water vertically mounted fountain head. This means
it will not work as an underwater venturi.
Another view of the foamer venturi unit with the inner
ball nozzle removed, clearly showing the design.
In conjunction with my own venturi it works great, and
using the valves I am able to adjust the water to
either or both of the venturi and the foamer nozzle,
so I get the benefit
of both a strong current (which the fish like to swim
against, which in itself gives them exercise and keeps
them healthy) and plenty of aeration in the pond, plus
the extra aeration from the
1. Here is the pump feeding just my venturi....
2. And here it is feeding both venturi and Beckett fountain.
3. Here it is with a bit more volume of water fed to
the foamer nozzle, but still some aeration from the below-water
4. And finally, we have the Beckett foamer fountain
nozzle in full flow (no flow going to the underwater
venturi). Whoah! This is actually rather too much! It
ends up splashing water over the sides of my small pond.
this would probably be ideal in a larger pond.
Resources / Where to Buy
Here are some further links to pages I found during
my own research on the Beckett foaming fountain nozzle.
Many pages discussing the device listed by Google had
links, but at the time of writing, the links I selected
below were all ok.
that any become dead please let me know.
Although there are lots of fountain pumps available
by several different manufacturers, there are not that
foamer nozzle. These are details of the few I located.
although a bit old (2001) Richard Durso's page provides
some more pictures of Beckett nozzles, however which
still available from Beckett I am not sure. The page
also details how Richard tried the Beckett nozzle in
an experiment to provide improved performance
within marine aquarium skimmer units. Further
down the page is some more interesting information on
affects the performance of the skimmer, and most important
an updated summary and conclusion on whether it was worth
it. Richard Durso's new web site provides a page
showing more pictures of his dual-Beckett nozzle skimmer (or click
the Home page of his RL180Reef web site).
The web site is well worth a look just for the
colourful pictures of anemones, clownfish, clams and
corals and DivX movies of his beautiful marine fish.
See the Picture
Gallery. I know its a bit off-topic for
my pond site, but my wife and I are keen scuba divers
and love the amazing colour and variety of marine life.
An equivalent bubbling fountain head can be found here
(MarketExpo sell the Little
Giant line of fountain nozzles,
and are based in Texas, USA):-
This is what someone had to say about the Little
Giant bubbler (although in the context of use
in a skimmer - it is probably perfectly adequate for general
aeration use in a pond):-
"I too tried the Little Giant bubbler (from
Lowes) when I couldn't find the Beckett - it was
satisfactory only in the upright position, and then
so. I had modified it a bit to get more airflow,
so I wasn't returning it, but when I get my pond
it will probably find a home there - BTW - it needed
a LOT of water to get fine bubbles - a 3/4" line
and close to 30 PSI and flow upwards of 8-12 GPM.
yup, good for a pond."
Oase make a foamer nozzle as well, although they appear
to be quite pricey! The following link is the catalogue
page for the UK based SeaPets online shop:-