OASE BioStyle Thermo 30 Hang-On Aquarium Filter with Heater, Navy review

Exact navy package identity

BioStyle Thermo 30 Navy is OASE SKU 84062. Its page identifies a navy BioStyle 30 base, SKU 84059, plus HeatUp 25 SKU 33798. The checked technical claims match the grey Thermo 30 in tank maximum, body dimensions, filter power, flow labels and total filter volume: up to 30 US gallons / 115 L, 5 W, 145 GPH / 550 L/h, and 1.9 L. The source pages show the same integrated preset-temperature statement at about 79°F. The color and the component identity are useful to preserve when checking a seller offer; they are not a higher capacity or a different filtration arrangement.

There is a heater question worth resolving before buying the package for a tank near its filtration ceiling. The Thermo page gives the preset temperature and included HeatUp 25 SKU. The separate official HeatUp 25 component page lists 25 W and a stand-alone maximum recommendation of 25 L, whereas the filter package is advertised for up to 30 gallons. The checked sources do not explain that mismatch. Do not treat the filter’s stated gallon ceiling as a heater-sizing guarantee. Ask OASE whether the bundled unit is intended to heat the actual tank size in your room, and whether the preset meets the livestock’s requirements.

Shared 30-size filtration, distinct color

The filtration package is the same size-class arrangement as the grey Thermo 30: two disposable multi-stage cartridges and two 30-ppi biological foams. OASE lists 1.9 L as filter volume, not media basket volume. Its max-flow figures are manufacturer statements, not aquarium measurements or a fish-load rating. The model is a rear-hung HOB; it requires no canister cabinet, hoses or external plumbing. A filter’s placement, however, is not proof that it fits a particular rim, light or lid.

For upkeep, the manufacturer guide recommends rinsing media before first use and not opening disposable cartridges. It advises removing carbon during medication. At startup, prime the filter, confirm flow, and only then connect the heater; the instructions say never to run the filter dry. The Thermo package does not include the outlet stopper listed for non-heated BioStyle packages. Follow the exact manual and confirm the complete Navy set’s components rather than assuming the grey item number applies.

Fit the aquarium edge and intake range

OASE’s setup guide lists a glass-thickness limit below one inch, a 6–14 inch telescopic intake and a maximum 5.5-inch drop from rim to water surface. It also gives a target intake position above substrate. Measure those values on the actual filled tank and allow room behind the aquarium to lift the unit out. A close canopy or wall can make service awkward even with no cabinet below. The adjustable flow control lets the user change movement, but manufacturer advice about flow is not independent proof for sensitive species or unusually high waste.

The 30-gallon figure is an upper-only label. Because there is no lower bound, the numeric finder will not call this an exact-volume match at 30 gallons. The Navy finish does not change that boundary. Likewise, 1.9 L is not a substitute for the missing basket amount, and an integrated heater does not make the filter’s gallon number a heat-load promise.

Choose Navy only when the finish and bundle are right

Compare the grey Thermo 30 review if you prefer that housing; the checked functional data are the same while the finish and base SKU differ. Compare the standard non-heated BioStyle 30 if you would rather select a heater separately. For this Navy package, confirm filter SKU 84062 and included base SKU 84059, then get manufacturer clarification on the HeatUp 25’s separate capacity statement before treating the heater as adequate for your tank.