Venturi For Aeration

25mm Venturi
Venturis are an efficient way to deliver air to your fish tank. They also do a great job of delivering O2 to and agitating the bio media in moving bed bio-filters.
While these may be more expensive than some units for sale online, I have found them to be far superior in doing the job after testing some the venturis made for liquid "injection".
This venturi runs really well with a flow rate of over 4000lph/1056gph from my experience.

25mm/1" Venturi

$35.00 + postage and handling

No discount offered on Venturi sales sorry 

Connecting these venturis is easy by using small sections of hose and hose clamps. It's a good idea to use 316 stainless clamps where they will be used in water to prevent corrosion.

Have also played around with a few different DIY home made venturis and found them effective if you're interested in having a crack at one of them first.

Other helpful Backyard Farming items can be found on our "Bits Out the Back" store.

Orders and Payments.

PLEASE NOTE, No GST is charged on orders at this time.

To place an order please email with the following information included,
  • The size and quantity of goods required.
  • Postal address and preferred postage method i.e. regular post or express post.
    Signature on delivery is also available for an extra $2.95 for those that require that service.
  • Preferred payment method i.e. Direct deposit, Paypal, Visa or Mastercard. (Further details on payment methods below) 

PayPal and Credit Cards
If you want to pay via PayPal, Visa or MasterCard  
a Paypal invoice can be generated and sent out to your nominated Email account.
Please note... 

You don't need a PayPal account to pay via Credit Cards.
Direct Deposit
Direct deposit can be made to 
Heritage Bank 
AC Name: Rob G, Bits Out the Back 
BSB 638-260 AC# 9019774

Please note... 
Direct deposit can take a few days for the funds to clear. If you can send me through a copy of the notification email or screen capture of the transaction I can post your 
goods off sooner.

A proper store page will be launched once it is cost effective to run one.

Postage and Handling

All goods will be sent via Australia post unless otherwise arranged.

Pre Paid Australia Post satchels are used to keep cost down where possible.  

Root Pouch orders need to be calculated on an order by order basis due to their bulky size. This is done to keep the postage rates as low as possible for all customers.

Express Post Rates

$10.85 up to 500g  
(355 x 220mm Satchel)

$15.65 up to 3kg
(405 x 310mm Satchel)

$24.80 up to 5kg
(510 x 435mm Satchel)

Parcel Post Rates

$8.50 up to 500g
(355 x 220mm Satchel)

$13.80 up to 3kg
(405 x 310mm Satchel)

$17.60 up to 5kg
(510 x 435mm Satchel)

Email enquiries can be made to

Many thanks,


PLEASE NOTE:   Prices may change without notice.

Rob Gray

ABN 94 753 294 205


  1. Hey Bob, hooked up the venturi I picked up last week and it's working a treat. Thanks

    Danny Day

    1. Nice one Danny. Shall have to pop by & suss it out ;)
      Cheers mate.