IceCap 4-Probe Magnetic Holder

The IceCap 4-Probe Magnetic Holder mounts to the sump or aquarium wall (up to 1/2in thick) to keep multiple test probes — pH, ORP, temperature, salinity — organized and in a fixed, repeatable position instead of drifting loose in the sump. Capacity: up to 4 probes Mount: magnetic, universal fit on smooth surfaces up to 1/2in thick Dimensions: 3.5in L x 2in W x 1.75in H Keeping probes in a consistent position matters for accurate readings — a probe that drifts into a low-flow dead zone or up near the surface can give misleading readings compared to one held steady in the main flow path. Also available: 2-Tube Magnetic Holder for dosing lines.