Hi Zimbo, most tackle shops carry ready to use berley at about $5 per pkt but the quantity won't fill the fishes grinder! So go to your local farm produce shop and buy a bulk bag of chook pellets and while you are there get some oil cake[normally called cattle food.Put half a bucket of chicken pellets in a 20 litre plastic container[old paint bucket] and add about 1/4 bucket of water and leave overnight and you will find that this will swell to twice it's volume as the pellets soften. Don't put too much water otherwise you will get a soupy mix. Add some Tuna oil, say about 1/2 a cup full and knead in about a kg of atta[wheat flour],enough to make the whole mix into a heavy, doughy consistency. There you have it! Make up some tennis ball or golf ball size balls and throw into the area of the lake you are fishing at regular intervals, with the original or start of the day amount being a good, generous supply. Don't forget to concentrate in and around your fishing spot.If you are fishing running water then throw in closer to the bank and cast in downstream. Maybe your balls of berley can be squeezed around a small stone or pebble so they will readily sink and take the berley down. The oil cake can be prepared in similar recipe except use warm water to soak overnight.By the way, you can add left over food scraps to your berley as well. Stuff like stale Cooked rice, etc.
Happy fishing Zimbo!
Why are you targetting carp when the best trout fishing can be had in NZ? Or snapper off the beaches?