The Seaside Aquatics Probe Holder is a clean, laser-cut acrylic rack that keeps your aquarium probes and lines exactly where you want them. Slot in your pH, ORP, salinity, and temperature probes and they sit at a consistent depth for stable, repeatable readings, with no more sensors dangling in the flow or sliding around the sump. It also doubles as a tidy holder for dosing-pump output lines and air tubing. Browse more aquarium equipment to finish your setup. Keep your monitoring gear organized and accurate. Loose probes drift in depth and read inconsistently. A fixed holder keeps every sensor in the same spot so your controller data stays trustworthy. Features Multi-probe organization: Holds several probes at once, sized for standard pH, ORP, salinity, and temperature sensors. Rim or sump mount: Sits over the tank rim, sump wall, or baffle so probes stay at a steady depth. Also holds tubing: Doubles as a holder for dosing-pump output lines and air line, keeping the tips secured at the waterline. Laser-cut acrylic: Clear, durable, and reef-safe, with clean edges that blend into the tank. Tidy cable management: No more probes drooping into powerheads or floating loose in the display. Specifications Brand Seaside Aquatics Type Acrylic probe & tube holder Material Clear cast acrylic Holds pH, ORP, salinity & temperature probes, plus dosing or air line Mount Tank rim, sump wall, or baffle Water Type Freshwater & saltwater Recommended Pairings Hydros Salinity Probe Kit and other probes to mount in the holder Browse aquarium controllers and dosing gear that pair with it See all aquarium equipment FAQ What can it hold?Standard aquarium probes, pH, ORP, salinity, and temperature, plus dosing-pump output lines and air line tubing. Does it work in freshwater?Yes. The acrylic is inert and safe in both freshwater and saltwater, and it holds the same probes used in either system. How does it stay in place?This model rests over the rim, sump wall, or a baffle. For a magnet-mounted version, see our Seaside Aquatics Magnetic Probe Holder.