big box

So if I got one of these Amazon pool waterfalls say the 24'' one and its rated for 2000GHP. If i cut more holes in it/ or the hole back i should be able to increase the GPH and Gravity would do its thing? This is for a raised pond pretty much making a sump hang on the back of the pond boarder...

In the past year or so, it seems like my local PetCos have grown a lot more ambitious. If you go to any of the PetCos within a 30 minute radius of where I live, chances are you'll find at LEAST one, and very possibly multiple of the following: Exodons, bumblebee gobies, pea puffer, wrestling...