Finnex HMA-50s 50 W Titanium Aquarium Heater

Exact-model photograph is not verified. This reference route is text-only. The source review retains the official HMA-family image showing a tube, analog controller, and guard, but it does not identify the 50 W assembly or a seller package; no exact HMA-50s package photo is verified.

Finnex lists the HMA-50s at 50 W for 10–20 US gallons, so the 10-gallon floor matters: this finder cannot enforce it. The HMA page also gives 68–92°F control and 0.45 A at a stated 115 V reference, but does not establish the complete electrical rating, HMA-specific setup directions, or a seller’s exact package.

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Documented model details

• Finnex names HMA-50s as a 50 W row, lists 0.45 A at 115 V, a 68–92°F control range, and a 10–20 US-gallon band. The 10-gallon lower endpoint is part of the maker’s stated range, not an inference from the 20-gallon maximum.
• The HMA overview describes a titanium tube, a precision analog controller, an LED heating indicator, a guard with suction cups, and freshwater/saltwater use. It also claims temperature maintenance within ±2°F of the setting, while using “electronic control” wording elsewhere; those are manufacturer descriptions, not an independently tested performance result or a second confirmed control mode.
• Finnex’s sizing footnote limits the table context to a standard enclosed aquarium and states maximum heating capacity of ±8°F above ambient. Room conditions and target temperature therefore matter; the chart is not a guarantee for every aquarium.
• The same family table lists HMA-100s separately at 100 W for 20–30 US gallons. That is a distinct row, not an upgrade proven suitable for every tank that reaches the shared 20-gallon endpoint.

Limits to weigh

• The full 10–20 US-gallon band matters. The unchanged finder can apply a maximum-volume rule but cannot reject a tank below the model’s 10-gallon minimum, so this configuration remains reference-only.
• The 0.45 A figure is tied to a 115 V reference; the reviewed material does not state the complete allowed input-voltage range or frequency. A US-oriented family page is not a substitute for the actual unit’s nameplate.
• The reviewed Finnex instructions index lists an HMH manual but no HMA manual. That bounded index observation does not prove no HMA manual exists, and HMH installation/control instructions have not been transferred to this product.
• The family page’s analog-controller wording conflicts with its “electronic control” description. Its ±2°F statement is a manufacturer claim without a reviewed test method, and no selectable temperature increment is documented.
• The reviewed records do not identify a retail SKU/UPC, exact seller package, model-specific length/clearance, or a current HMA-50s offer. The separate ten-card titanium Shop collection omitted HMA, but that limited collection result does not establish discontinuation or absence elsewhere.
• Finnex’s general warranty page describes 180 days for an original purchaser under normal use and excludes dry-burn damage; the reviewed evidence does not tie that policy to a particular HMA-50s package or offer.
• This reference page is text-only. The standard review retains Finnex’s official HMA-family image of the tube, controller, and guard, but it does not label HMA-50s, 50 W, the package, or an electrical rating. No exact 50 W package photo is verified.

Check before ordering

• Confirm that the selected item and carton identify Finnex HMA-50s at 50 W; do not substitute HMA-100s or another titanium-heater series. The reviewed evidence does not provide this model’s retail SKU or UPC.
• Compare the entire 10–20 US-gallon manufacturer range with the actual aquarium and room-to-water temperature difference; do not treat the 20-gallon ceiling as proof the heater suits every smaller aquarium.
• Read the actual heater nameplate for allowed voltage and frequency, then obtain current HMA-specific directions for mounting, immersion, clearance, and operation. The table’s 0.45 A at 115 V is not a complete electrical specification.
• Ask the seller to identify the exact shipped HMA-50s package and confirm the guard and controller components needed for the intended setup; the family overview does not authenticate a retailer’s box contents.
• Check that any seller warranty/return terms apply to the exact offered item. Finnex’s general warranty language is not proof that a particular listing or package is covered.
• Choose a livestock-appropriate target temperature independently of the 68–92°F control span, then verify aquarium water with a separate thermometer; the ±2°F statement is not an independent performance test.