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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13
Remains flexible in cold temperatures
Graduated in centimetres on both sides
Feature Specification Manufacturer Penn-Plax® Model B11 Product Type Automatic Battery Back-Up Air Pump Power Source 2 × D-cell batteries (not included) AC Connection Detects power outages only (does not power or charge the pump) Automatic Operation Yes Manual Operation Yes Maximum Aquarium Size Up to 55 gallons (208 L) Operating Time Up to 48 hours (depending on battery quality) Air Outlet Single Dimensions Approximately 6 × 3
A stainless steel encapsulated temperature sensor gives fast
Transparency Turbidity Tube with Secchi Disk, 60 cm Clothing Remains flexible in cold temperaturesProduct Code: 77291 MPN: PH112014860SPR The Turbidity Tube with Secchi Disk is a simple, portable instrument used to estimate water turbidity by measuring the depth at which a black and white Secchi pattern is no longer visible through a water column. Designed for field and laboratory use, the tube provides a quick and economical method for assessing water clarity in lakes, rivers, ponds, reservoirs, aquaculture facilities, and environmental