Whereabouts in Carshalton, I used to live up near St Helier hospital!
I was gonna suggest teyh CALPAC waters but you appear to have found them, I cut my teeth on the Stew Pond in Epsom, great fun. I only fished Manor Pond once so can't offer too much although I'd approach it as a silty venue now and look for hard/clear patches and fish on a tench unfriendly bait.
I spent most of my time after Epsom at Farlows near lamgley. Only 45mins away so possibly a goer for you, I worked near there so weekends were ideal after work.
There's a lake at Redhill, Old Philanthropic springs to mind. Also Gatton Manor near Dorking. Both are club type waters.
On the day ticket front have a look at Bury Hill just outside Dorking, lovely lake with some cracking carp. Try fishing near the marginal lilies, Pepperami over trout pellest worked years ago for the carp, set up well back and keep the rods away from the edge of the lake, sit right back and keep quiet.
There's some lakes up at Hampton Court in the park and also in Richmond Park but the Richmond lake is/was rock hard.