Aqueon Pro Adjustable Heater 300 W

The current Pro 300 W is item 100532087 / UPC 015905000611 and corresponds to manual model AP300W-H. Its manual recommends 65–90 US gallons while the 2025 catalog says up to 100; that source conflict and the unmatchable 65-gallon lower boundary are retained here.

Confirm the exact model, package quantity, condition, included parts and current seller terms before ordering.

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Documented model details

• The exact AP300W-H manual row recommends 65–90 US gallons and lists 15.0 inches overall length. The 2025 catalog maps item 100532087 / UPC 015905000611 to Pro 300 / 300 W and says up to 100 gallons; it separately lists item dimensions of 1.5 × 1.75 × 15.0 inches and package dimensions of 3.5 × 1.5 × 15.25 inches.
• Aqueon’s household planning chart assumes a 68–72°F room and lists 300 W at 100 gallons for the 5°F, 10°F, and 15°F rise columns. This does not reconcile or replace the manual’s 90-gallon upper recommendation and is not a performance test.
• The Pro family page describes adjustable 68–88°F control and manufacturer-stated ±1°F precision. Aqueon’s red heating indicator is not a digital reading of aquarium water; use a separate reliable thermometer and the manual’s 24-hour adjustment routine.
• The maker describes a non-glass thermal-plastic body over a metal core, freshwater/marine use, full submersion, vertical or horizontal positioning, tilt/overheat shutoffs, suction cups, a marked waterline, and a six-foot cord. The manual requires circulation, a drip loop, at least 30 minutes submerged before power, and no dry operation.
• The official UPC-specific carton visibly identifies Pro 300 / 300 Watt and an up-to-100-gallon label; this confirms package variant identity but not the higher manual recommendation, installation clearance, or actual heating performance.

Limits to weigh

• The manual’s 65–90-gallon recommendation and catalog’s up-to-100-gallon statement conflict at the upper end. They remain separate manufacturer statements; do not merge them into an operating guarantee.
• The manual’s 65-gallon lower endpoint cannot be enforced by the current upper-limit-only matcher. Pro 300 remains excluded from finder matches and ordinary questionnaire purchase recommendations; its model-reference page does not certify compatibility.
• The chart’s 100-gallon entry assumes the maker’s stated room and target-rise planning framework; it does not independently validate the manual’s broader upper boundary or promise performance in a specific setup.
• The manual overall length, catalog item dimension, and carton dimension are different fields. None determines submerged clearance or tank-rim fit.
• The product image confirms the package text only. It does not prove current seller inventory, the delivered box, or installation scale.

Check before ordering

• Match the exact Aqueon Pro 300 W / AP300W-H / item 100532087 / UPC 015905000611; do not substitute the separate 250 W AP250W model or another wattage.
• Read the manual’s 65–90-gallon recommendation alongside, not overwritten by, the catalog’s up-to-100-gallon claim. If your decision depends on the difference, confirm current model-specific guidance with Aqueon rather than assuming either field is a universal guarantee.
• Use the sizing chart only with its 68–72°F room-temperature assumption and the intended temperature-rise column; it is not a measured performance promise.
• Check actual clearance, waterline, circulation and cord path. Keep vertical placement above the marked minimum or horizontal placement fully submerged; wait at least 30 minutes underwater before connecting power, use a drip loop, and never operate dry.
• Verify the exact 300 W package, item number and UPC on the offer; use a separate thermometer rather than treating the heating light or stated thermostat precision as measured water temperature.