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Pipe shutter. The plug expands by turning the wing nut. Ideal for temporarily plugging a pipe!
For optimum oxygen supply to the pond, use this Koi Pro flowing bubble ring. Consisting of a stainless steel ring and a porous tube, the bubble ring maximises the injection of oxygen into the water, making it ideal for koi ponds. The Koi Pro bubble ring is also ideal for filtration systems, floating media chambers, quarantine tanks and breeding tanks.