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if i understand well, the fish tank should not be flat at the bottom ?

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  • if i understand well, the fish tank should not be flat at the bottom ?

    all the waste should be accumulated at a point where the pump will be located ? Please advise .

  • #2
    Yep, you understand right. That is the ideal. Everyone doesnt have the "ideal" situation, though, so we work with what we have. My first pond was a flat bottom rectangular hole in the ground with the floor at a slight angle so the "stuff" would eventually migrate towards the pump at the lower end. My newer setup is with a flat bottom round tank. I have designed the return from my sump tank to flow in such a way to create a gentle whirlpool effect which will help the solids migrate towards the center where my pump is. Neither is perfect, but it works good enough for me.

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    • #3
      The theoretical ideal is a purpose-built aquaculture tank with a cone-shaped bottom and a bottom centre drain. For practical purposes, a 'faux' parabolic tank with a rounded bottom is arguably the most cost-effective. As Ian has stated, you can pretty much use any tank that allows you to set up a circular 'whirlpool' effect.

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