I just use Vitasport electrolyte rehydration which you can get at countdown. pretty cheap and does the trick for me. Taste good too.
Energey gels can be got from Torpedo 7 etc - their a bit pricy at $3.99 each I like the coffee flavoured ones. Keep them in the pouches on my packs belt so I can grab one while on the go without taking the pack off.
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