Aquarium Heaters – Adjustable Fish Tank Heaters for Freshwater Aquariums

Aquarium heaters are essential for maintaining a stable, healthy water temperature in tropical fish tanks. At Tropical Treasures Wyo, we offer reliable, adjustable submersible heaters sized for nano tanks up to large aquariums, keeping your fish, shrimp, and plants comfortable year-round.

Choose the right wattage for your tank size and pair your heater with dependable filtration, quiet air pumps, and aquarium tools for a complete setup — ideal for planted aquariums. Fast shipping from Wyoming nationwide.

Aquarium Heater Wattage Guide

Not sure what size heater you need? Use this quick reference to match your tank volume to the right wattage. As a general rule, aim for roughly 3–5 watts per gallon, and size up if your room runs cold or you keep warm-water species like discus.

For tanks larger than about 75 gallons, many aquarists run two smaller heaters instead of one large unit—it spreads heat more evenly and gives you a safety margin if one ever fails.