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Aqugarden Gravity Filters
Three functions ... Biological, Mechanical & UVC*

High capacity filter canisters together with the unique multi-foam layout reduces cleaning by up to 3 times   compared to conventional filters.
High capacity mechanical / biological flow through with multi chamber filters for clear ponds Aquagarden Biologic 12000 gravity pond filter

pond pump frog

Aussie's observations

Suitable for:  Any natural or fish pond including Koi.  Ponds that do not have waterfalls (unless the filter is mounted at the very top of a waterfall or stream) Pressure filters are much more suitable for waterfalls.
What we liked:  Very good value for money. Easy to install and clean. The clear water guarantee on UVC models.
Other products of this type:
Made in China Biologic
Suitable flow in litres per Hour through the filter See below
Max pond size see chart
Dimensions (cm) L x W x H 45 x 34 x 50
Cable length on UVC models 5 m
Inlet hose tail supplied 20 & 25mm
Outlet (mm) 70 mm
Number of filter foams 2
Biological filter medium Bio Balls
UV clarifier on models 11 watt
Suitable pumps see below
Guarantee  (UV lamp excluded) 2 years
Gravity Bio filter with UVC N/A



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Total shipping per order Only $10 to any Australian Address - Prices Include GST
Trade customers - Buying for resale - Call 1800 607 388 or click > Trade contact




Confused about selecting your filter

Filter selection

To choose the ideal filter for any pond you must first know the correct flow through the filter to maintain ideal water quality for your pond. (Please remember that the pond size alone does not determine the filter or pump size without first taking into account the many environmental and physical factors) 

3 ways to get help
to establish flow

  1. Fill in one of our e-mail help forms and let us do all the calculations for you

  2. Give us a call 1800 607 388 for expert advice

  3. Do it yourself and use our quick reference flow calculator for rough estimate

  • Step one: Establish the required flow through the filter keeping in mind waterfall** height if any, or long hose**

  • Step Two: Choose a pump, they are listed below in order of quality and suitability

Recommended flow through the filter - litres per hour

Minimum Flow 1,800
Ideal flow 2,200
Max flow 2,500

FAQ (frequently asked questions

Pond size chart 12000
No fish* Pond size - litres 12,000
Some fish** Pond size - litres 6,000
Medium fish*** Pond size - litres 3,000
Lots fish/Koi***** Pond size - litres 2000

*No fish - Near natural garden ponds with plant zones, without fish.
**Some fish - Garden pond with plants and fish stock of 40cm per 1,000 litres
***Medium fish - Garden pond with plants and fish stock of up to 60cm per 1,000 litres
****Lots fish / Light Koi - Garden pond with plants and fish stock of up to 80cm per 1,000 litres
*****Koi & Turtles

Suitable pumps for Aquagarden gravity filters



Most suitable pumps**

Oase Aquamax 2500
Laguna Maxflo 2200
Other workable pumps**

**Special note, if using a waterfall or a long hose between pump and filter the pump will need to be larger to allow for the reduced flow caused by the head (pumping height, and/or hose length)   If in doubt Fill in one of our e-mail help forms and let us do all the calculations for you.
# A little under size for some pond sizes, but would work if the pond were smaller than the filters maximum volume rating.
## This pump is a little too strong, unless a waterfall over 1m is in place. However, you can never have too much pond flow, so, by releasing water back into the pond through a "Tee" and flow valve added circulation is provided for the pond.

 Aussie's additional thoughts

Tip  1: Place the pump at the opposite end of the pond to the water return, and in the deepest part of the pond.

Tip 2: Interpet offer a chemical to prime filter systems, a great way to hasten biological activity. Pond Bio start 

Tip 3: If in doubt always choose a pump with less than the maximum recommended flow and less than the recommended head height (see point 5). Within reason the slower the water passes over the UV lamp and through the filter the better the result. However, you can never have too much pond flow, so, by having a slightly oversize pump and releasing water directly back into the pond or on to a feature or waterfall through a "Tee" with a flow valve, added circulation is provided for the pond.