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Old 10-27-2011, 05:42 PM   #1
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Diy filter idea advice

I have a 90 gallon Cichlid tank running a Magnum 350 canister filter and a Penguin 350 HOB filter. The tank is about a year old with 12 various African Cichlids, three African cats, and a red tailed shark.
I would like to replace both filters with a custom built filter using two Whirlpool "Valve in Head" whole house filters. One for particulates and one with a carbon filter.
I would pull the water from the tank using a continuous duty pump with a sponge filter on the intake. I'm attaching a simple diagram of what I want to do. I've already built a similar setup that I use for water polishing and gravel vacuuming.
I would like to get some advice on whether this feasible setup or not. Am I over simplifying this?
The Magnum 350 is a pain to pull out and clean/replace media, and the HOB is loud and unsightly.
Any advice or comments would be greatly appreciated.
Thanks
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Old 10-29-2011, 12:03 PM   #2
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I think you concept is sound, I've seen others do exactly this.

Although, some of the problems that I've seen some others (Myself) run into are.

1) Depending on the micron size of the particulate filter, you may want a filter material that will filter somewhere in between your intake sponge and you micron filter used to polish the water. That way you have a filter for the large (Sponge on intake) particles, a filter for medium (I recommend gutting an old whole house filter and wrapping it with the blue cut to fit filter media for you application) particles, and lastly a filter for small (I use a 30 micron whole house filter) particles. If the last particle filter clogs much quickly than it should, then build another just like it and run them in parallel. This will also lower the resistance of the last particle filter helping flow.

2) I would consider another chamber dedicated for nothing but bio-media after the carbon.

3) Pump size is tricky when working with DIY filters. Hard (Not impossible) to calculate the filter resistance. I'd recommend a valve before the pump and after the last chamber to help control the water flow. As well as help in maintenance.

Just my 2 cents...
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Old 10-29-2011, 04:06 PM   #3
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Quote:
Originally Posted by kjbuente View Post
I think you concept is sound, I've seen others do exactly this.
Thanks for your input. I agree about the adding additional filters and bio media.

Here's an updated drawing:
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