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I don't know anything about pond pumps, piping/plumbing or electricity, co please bear with me.

My project:

Small in-ground preformed pond, 18'' deep, 50 gallons

For bog filter: preformed liner, 15'' high, 19'' bottom and 24'' top diameter, 20 gallons

The 'bog' will be semi-buried/elevated 8'' above water surface. Filtered water will return to pond thru small preformed waterfall.

So I guess (again, I don't know anything about how it works) the water will need to be lifted 26'' (pond bottom + edge of the 'bog'), then go down to the 'bog', lifted again to the top of the waterfall = 15'' of the 'bog' total height.

If I understand well what I read so far, I need at least 100GPH pump to handle 50 gal pond, but I need to take into account the water lifting as well, so the pump will have to be bigger, right?

Thanks in advance!

My project:

Small in-ground preformed pond, 18'' deep, 50 gallons

For bog filter: preformed liner, 15'' high, 19'' bottom and 24'' top diameter, 20 gallons

The 'bog' will be semi-buried/elevated 8'' above water surface. Filtered water will return to pond thru small preformed waterfall.

So I guess (again, I don't know anything about how it works) the water will need to be lifted 26'' (pond bottom + edge of the 'bog'), then go down to the 'bog', lifted again to the top of the waterfall = 15'' of the 'bog' total height.

If I understand well what I read so far, I need at least 100GPH pump to handle 50 gal pond, but I need to take into account the water lifting as well, so the pump will have to be bigger, right?

Thanks in advance!

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