Finnex STE-800 digital titanium aquarium heater

Finnex lists the STE-800 as an 800 W digital titanium heater for 190–265 US gallons, with a 68–92°F control span. Its 190-gallon floor cannot be applied by this site’s maximum-only finder, and the model table gives 6.67 A without a voltage basis; this is a model reference, not a compatibility recommendation.

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

As an Amazon Associate I earn from qualifying purchases.

Read the detailed model assessment · Find products for my needs

Documented model details

• Finnex’s US Shop variant data pairs the 800 W selector with SKU STE-800, UPC 850006562442 and a distinct variant ID; it is not the separate STE-200, STE-400 or STE-600 configuration.
• The STE-800 row in Finnex’s specification graphic lists 800 W, 6.67 A, 68–92°F and 190–265 US gallons. The graphic gives no voltage basis for amperage and says all listed STE sizes use a six-foot power cord.
• Finnex describes digital push-button control and a remote temperature sensor for the STE series. The maker states one-degree setting steps, ±1°F accuracy and redundancy protection; these are product claims, not measurements independently reproduced here.
• Finnex’s comparison chart identifies a titanium tube, nickel heating coil, freshwater/marine suitability, ETL listing to UL standards and a non-resumable fuse in its out-of-water-protection row. This wording does not establish installation limits or permit dry operation.
• The official STE table does not give the STE-800 body length or a mounting-clearance requirement, so the six-foot power cord should not be treated as an installation dimension.

Limits to weigh

• The listed 190–265 US-gallon band has a meaningful lower as well as upper boundary. This site’s current finder can screen only against the 265-gallon maximum, so the STE-800 remains reference-only and is not a finder recommendation.
• Finnex lists 6.67 A but the reviewed official sources do not identify its voltage basis or state the exact STE-800 voltage and frequency. Do not infer a complete electrical rating from amperage or from another model.
• The checked Finnex instructions index lists HMH, HMS and HPC heater manuals but no STE document. Exact immersion depth, orientation, clearance and dry-operation permission remain unverified; an index omission does not prove no separate instructions exist.
• Finnex’s ±1°F accuracy, redundancy and protective descriptions are maker claims rather than independent measurements or failure-rate evidence. Verify aquarium water with a separate thermometer after following the actual supplied directions.
• The saved 2026-11-01 Finnex Shop snapshot showed the selector sold out, which does not establish discontinuation. The exact-model Amazon.com US request returned HTTP 503 on 2026-11-04 before results or listing details, so no exact marketplace listing or seller package is verified; the blocked response is not evidence of absence.

Check before ordering

• Check the offered carton and unit for Finnex STE-800 / 800 W and the exact SKU; do not substitute an STE-600 or another sibling based on wattage or appearance.
• Treat Finnex’s 190–265 US-gallon figure as a two-sided maker range; do not select this model solely because a tank is below the 265-gallon ceiling.
• Read the exact heater/controller nameplates and supplied directions for voltage, frequency, immersion, orientation and clearance; the listed 6.67 A does not establish the full supply rating.
• Confirm what the actual seller offer includes. The retailer identity photo shows the labelled STE-800 carton, guarded heater and controller but does not prove any present offer contains those items.
• After installing only as directed, check the aquarium’s actual water temperature independently; the advertised setting range and ±1°F accuracy statement are not an independent result.