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Filtration
Hang-On-Back (HOB) Filter
A simple external filter that hangs on the tank rim - affordable, effective, and easy to maintain for small-to-medium tanks.
Price: Budget
For: Freshwater $15-$100
📖 Overview
HOB filters are the workhorse of the beginner freshwater hobby. They hang on the rear of the tank, drawing water up through a lift tube, over customizable media cartridges, and back into the tank via a waterfall return. Simple, affordable, and effective up to about 75 gallons.
🏷️ Top Brands
AquaClear (Fluval) - reference gold standard. Marineland Penguin. Tetra Whisper. Aqueon QuietFlow.