Kitchen Craft fondue fuel: You can find this Kitchen Craft 3 pack of fondue gel fuel (shown above) on Amazon (via Marketplace sellers) for around £3/£4.
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Amazon.com: HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range, 1 ppm Resolution, 2% Readout Accuracy: Home Improvement
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