Magnetic Dosing Line HolderImprove the cleanliness of your fish tank with the Magnetic Dosing Line Holder. This magnetic line holder is designed to easily organise your dosing lines in your tank. Magnets hold up to 12mm glass acrylic (can be made up to 19mm but requires custom magnet arrangement), both sides of the holder can be immersed in water. Supplied with acrylic tube, 1 4 JG mounts and 1 4 1 8 tube adaptors as pictured. All our magnets are dual coated epoxy coated, then