That’s the thing I have no idea in my mind on how to do the piping or how to install this planter on my pond. I would love to tho .I think you all are talking about pumps WAY too strong for a 175 gallon plus 20 ish gallon bog. I would think a 150 - 300 gph pump would be perfectly adequate to circulate water through the bog every hour.
This is the type of basket I put the pump in surrounded by pea gravel so it takes longer before it clogs with leaves and gunk. SOmeone on this site posted that tip.
Our 10-inch Aquatic Plant Basket features a strong, durable housing for most aquatic plants. Simply place your aquatic plant and soil into the basket, and carefully lower the plant basket into your pond.www.homedepot.com
And this is probably the pumps I would get today for an under 300 gallon pond. I know nothing about the brand, it just happens to be what the closest home improvement store has in stock.
Here is a 330 gph pump for 60$ that comes with an extra aeration spray if you want to add it.
Enjoy the benefits of two products in one and design a stunning medium-sized pond! TotalPond's 330 GPH Pond Pump with Nozzle Kit features an energy-efficient pond pump that promotes a healthy ecologicalwww.homedepot.com
And here is a similar sized pump that comes with it's own prefilter basket for 100$ I do have one of these baskets on my waterfall pump. This could be instead of the pea gravel basket I mentioned above. An advantage to this box is that if the bog was overflowing, the pump can not pull lower than this box so there would be enough water to keep fish alive if bog sprung a leak or overflowed.
TotalPond's Complete Filter Kit with Pump is a cost-effective, all-in-one pond maintenance system. It’s ideal for protecting the included pump from debris, promoting the growth of beneficial bacteria,www.homedepot.com
A similar sized pump is available without the aeration spray or filter box for about 40$. This may be the one I get today for my new bog.
Our TotalPond 300 GPH Fountain Pump is the perfect choice for large fountains and spitters. This durable, compact pump might be small but its ideal pumping height is 5 ft., with a maximum pumping heightwww.homedepot.com
Now that I see your pond pic, I might use a simple "window box" type planter diagonal on one of your corners, with one or 2 rows of bog piping. I would cut a little overflow area so it waterfalled back into your pond.