Dupla $ is ridiculous here as they don't keep stocks of hardware in the country. If you buy a dupla unit, then you pay for them to import it from DK. I'd love to have one of their MH lights, but the price is a joke for that reason.
A couple of years ago, when I had too much money to play with (!) I bought a delta controller and reactor-S. It's pretty good, but if I were to do it again I'd
1. Get a 1000g canister and solenoid from a welding supply shop.
2. make a bubble counter from an old bottle.
3. stick one of those little co2 gauges (such as dupla's) in the tank.
4. put the solenoid on a day/night timer.
Sera hardware prices are much more reasonable here, but I don't know if their co2 kit is any good.
Buying online from the US can be a pain because Aussie import customs grab your stuff and then extort so much import tax that it works out to be the same price as buying from a shop here.
There really shold be one tax for commercial importers and another for direct end users... But that's another story.
