Python tank. fresh water set-up

Want to see what kind of feed back I could get for an idea I have for a future ball python. Planning on putting in "pond" in the tank with a pump/filter. kind of just running through start off ideas to put it on a large glass tank. From there comes questions and worries of the effects, practical use, or safety issues towards the ball python. Any thoughts or suggestions would be greatly appreciated.

Was thinking of going with a large exxo terra terrarium. The ones that have the water proof bootoms with front hinged doors. From there I would measure out a portion of the tank on the would be cold side. Either with one piece or two with silicon sealant. The size would thought with installing a water pump/ filter. easy cleaning of fecal matter is a sure thought with soak and poop pythons. The thought of a pump/filter was in reasoning to keep water clean, easy re-filling with no dish take out, also the aesthetic purpose it would bring. Over just creating a dropped dish holder or something like that.