The Aquascape IonGen™ G2 Probe Holder positions your Aquascape IonGen™ Probe properly in your water feature without the use of the included flow chamber. Great for use in skimmer filters and Pondless® Waterfall Vaults, the IonGen™ G2 Probe Holder is able to strap to any pipe or check valve between 1” and 4” in diameter. The specialized design holds the probe in its proper position, and the durable construction ensures trouble-free use.