Firstly, pond bogs help keep your pond water cleaner and clearer. They do this through beneficial bacteria that attach themselves to gravel included in the bog. Plants in the bog take up nutrients, toxins, and the like to starve any algae.
Thus your pond water is cleaner and clearer plus the plants make a wonderful new addition.
Now Connor wants to see a these pond bog filters for himself. They at least need to look good if they’re going to agree on getting one. “It’s not bad, but I guess that’s because this is right after it was installed”: