Monster
It's in Rachel de Beer Street in PTA North, there used to be a rubish dump (landfill site) there, once you passed the comercial area with all the businesses and start getting houses again (coming from Paul Kruger st) you'll pass a Shell garage on your left. You'll get a traffic light (if memory serves me well) and the entrance after that is the golf course. You should be able to see a large concrete (double storey structure unfinished) on your left, that's the pond where you fish.
Fishing is somewhat weird as they will strike any colour plastic as long as you cast or retrieve close to them, now this is where it gets weird, you can't really see them !!!! If you do, just cast, it's gonna get hammered. Almost the same as Thulani.