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intelligent
Versatile use – Suitable for freshwater
A colourless sample indicates zero nitrate
or moving water through filtration systems
Neptune Systems - Apex Jr. System A3 Wood intelligentThe Neptune Systems Apex Jr. System A3 delivers powerful and affordable aquarium monitoring in a streamlined packageperfect for hobbyists who want essential automation and protection without the complexity of a full controller system. Designed as an entry point into the Neptune Apex ecosystem, the A3 Jr. provides robust monitoring capabilities for temperature, leak detection, and optional expandability through additional sensors and modules. The