DIY Undergravel Jet system (lots of pics)

  • We are currently upgrading MFK. thanks! -neo
crossleymarko;3073734; said:
how effective is this, does it work.. from what ive read it seems pretty effective any one else done it
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I built one but I went with an external pump plumbed in a closed loop. I have 25 jets in my 300 gallon tank and it works great.
 
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