DannerDanner Pondmaster DNR02217 02217 700 GPH Pond Pump with Filter and Fountain Set, Black

Never had a fish pond before and am wondering how this works...exactly. Can someone explain how it works to a beginner?

What size is tubing? from filter to pump.

Will koi fry get sucked into this filter?

Now I have another question....is this too much power for my 275 gal stock tank? I'm only going to use the filter since I have another fountain.