Finnex HMC-500S 500 W Titanium Aquarium Heater

Exact-model photograph is not verified. This reference page is text-only; the standard review retains the official HMC-family component composite showing a controller, guarded heater element, separate sensor/probe, and circuit-board illustration. It does not identify HMC-500S, 500 W, exact element length, scale, or a delivered package.

Finnex lists HMC-500S as a 500 W titanium configuration for 100–125 US gallons, with a 15.1-inch element and an adjustable 68–92°F control range. The lower capacity boundary matters: treat this page as a model-identification reference, not a recommendation for an aquarium. The reviewed record does not establish the full electrical input or detailed installation directions.

Search results may include other models. Confirm the exact model, applicable region, condition and included parts before ordering.

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Documented model details

• Finnex’s HMC-500S row gives 500 W, a 100–125 US-gallon band, 4.17 A at the table’s 110 V reference, a 15.1-inch element, and 68–92°F control. The 100-gallon lower endpoint is part of that stated band.
• The HMC family description identifies a digital illuminated control unit, adjustable settings, a separate remote temperature sensor, and memory for the prior setting after power interruption. These are manufacturer descriptions, not independently measured controller or water-temperature results.
• The family table assigns HMC-400S a separate 400 W / 80–100-gallon row and HMC-300S a 300 W / 60–80-gallon row. Their bands meet HMC-500S at an endpoint; that overlap does not establish interchangeable output or fit.
• Finnex describes the HMC family as a titanium-element, guarded, submersible heater for freshwater and marine aquariums. These family-level descriptions do not authenticate a seller’s delivered bundle or exact installation arrangement.
• The grouped official Shop record identifies a distinct HMC-500S / 500 W option and SKU with its own variant ID; the barcode field is null. That supports model identification, not stock, price, or package contents.

Limits to weigh

• The manufacturer’s stated band is 100–125 US gallons; do not treat the upper limit alone as evidence for a smaller aquarium or extend it above 125 gallons.
• The 4.17 A figure is tied to a 110 V reference. The reviewed material does not establish the full allowed supply-voltage range or frequency; the actual unit label and current instructions are needed for electrical decisions.
• The checked Finnex instructions index lists HMH, HMS, and HPC manuals but no HMC manual. This records the index contents only; it does not prove an HMC manual does not exist. Exact waterline, immersion depth, orientation, placement, and clearance directions were not verified.
• The Shop record’s model/variant identity does not establish the package a particular seller will ship; it gives no barcode for this variant, and no third-party offer or current stock was verified.
• The official HMC image is a family component composite, not a 500 W-specific assembly or package photograph. The reviewed sources also provide no independent accuracy, water-temperature stability, or performance test.

Check before ordering

• Check that the selected option, unit label, and any carton identify Finnex HMC-500S at 500 W; do not substitute HMC-400S, HMC-300S, or a different Finnex family.
• Compare the whole 100–125 US-gallon manufacturer band with the actual aquarium and operating conditions instead of relying on the upper endpoint alone.
• Read the actual heater nameplate and current model-specific instructions for its allowed voltage, frequency, and installation requirements; 4.17 A at 110 V is not a complete electrical rating.
• Ask the seller to confirm the exact shipped HMC-500S package and included controller, remote sensor, and guard rather than inferring box contents from family imagery or a model code.
• Confirm the element’s clearance and intended waterline, orientation, and placement from the exact instructions before installation; the family page’s broad “submersible” label does not supply those details.
• Choose any aquarium target temperature from livestock-care guidance rather than treating the 68–92°F controller range as a species recommendation, and verify tank water independently after setup.