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DIY Back Flush Filter Set-Up

By Stan & Debbie Hauter, About.com

A good starter Angelfish species

Flame Angelfish (Centropyge loriculus)

Image by Keoki and Yuko Stender

Many filtration systems, like the carbon tube system as an example, need to be periodically back flushed in order to remove detritus and organic build up in the bio media. Here is a simple DIY Back Flush Set-Up that you can add to your system. This will allow you to reverse the water flow through the filter bio media to easily clean it, leaving the biological bacteria in tact.

We are using the Magnum 350 Canister Filter as an example for this project, as that is what we have on our system. If you have a Magnum canister filter, while you are purchasing the valves you might want to order two extra double valves. Insert these onto the input and output tubes where the water goes in and out of the Magnum. When you want to open the filter for maintenance, just turn off the canister pump, turn the valves to "off" and disconnect the canister for cleaning. This really reduces the problem of water trapped in the tubes spilling out and and going all over the place. Parts List
Note: When purchasing the valves and the extra plastic tubing you need for this project, be sure to buy the correct sized diameter for the valves and tubing to fit your present system. (I.E. 5/8", 1/2", etc.).

3 - Marineland Quick Disconnect Double Valves

3 - Marineland Quick Disconnect Single Valves

1 - Piece of plastic tubing for the pumping of the waste
water into the bucket. For the length of the tubing, just
determine how long you want it to be for reaching and
pumping the waste water into the bucket.

If close enough to a sink or toilet, you can pump the
waste water directly into it without having to use a
bucket to collect the water in. If you do it this way,
remember that the longer the tubing, the farther distance
the waste water has to travel. This will slow the water
flow pumping rate , especially if you are going to pump
uphill, or at an inclining angle.

1 - Piece of plastic tubing to create the cross over hose.

For Marineland Magnum Filters and accessories visit
Leisure Time on-line. Instructions
Diagram 1 demonstrates the system set up with all the back flush valves in place, while the system is running normally. By looking at this diagram you can see where to splice in all the quick disconnect valves and extra tubing. Depending on your system configuration, you can place these valves appropriated to fit your system set up to achieve similar results.

Diagram 2 demonstrates when the system is in the reverse flow back flushing mode.

Stan & Debbie Hauter
Guides since 1997

Stan & Debbie Hauter
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