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This ThermoFit Pre-Insert part is necessary if you decide to add an internal heater to your existing canister filter
green when at 78F
Fully Submersible and shatterproof
Easy to read LED light indicator with three color modes of operation
Reef Octopus HOB Air Silencer Part # ROP-SIL-HOB --- Marineland This ThermoFit Pre-Insert part isReef Octopus HOB Air Silencer Part # ROP SIL HOB Helps reduce venturi suction noise of the skimmer pump. Fits Reef Octopus HOB Series Skimmers Ideal for 5 16" air lines.
