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many nitrate test kits are prone to amine interference which can make the levels of nitrate appear much lower than they actually are
harmful if swallowed
replacing the Fluval 2 Plus internal power filter
Easy installation above or below ground level
Blagdon Powersafe 4 Switch - 1040228 Popular many nitrate test kits areBlagdon PowerSafe Switchboxes are designed for safe pond side and garden electrical connections. Each has at a glance unique power on and power standby indicator lights helping to keep you safe. PowerSafe Switchboxes are weatherproof and designed specifically for outdoor use. An integrated wall or post mounting bracket and fittings included. Fused outlet for up to 1 x 1000w and 3 x 300w. Total capacity 1300w