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[africancichlidau]

I use the in/outs from Dick Smiths. 50 bucks each but well worth it, the batteries last ages and they are very accurate. You's gets wot yous pays for I guess. Oh, one thing though, they are not the best in enclosures with sand substrate as the sand tends to jam up the buttons after a few months with animals that tend to dig or throw the sand around a bit.