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Skimming
HOB Protein Skimmer
A hang-on-back skimmer for small saltwater setups without a sump - popular for AIO nano reefs.
Price: Mid
For: Saltwater $80-$400
📖 Overview
HOB skimmers hang on the tank rim. Suitable for fish-only or nano reefs where a sump is impractical. Less powerful than in-sump skimmers but easier to install.
🛒 Buying Guide
Aquamaxx HOB and Reef Octopus HOB are the popular models.