Aquael PAT MINI Internal Aquarium Filter review

The current US-localized Aquael page distinguishes PAT MINI FILTER item 120623 from PAT MINI FILTER (EXTRA SPONGE INCL.) item 113835. This assessment is for the standard item 120623, not the extra-sponge bundle. The model table prints a 2–30 US-gallon / 10–120 L tank label, 4.5 W, and a listed output of 119 US gal/h paired with 400 L/h. The page lists adjustable performance, a directional outlet and mechanical media in the set. These are manufacturer specifications; they are not installed flow measurements, a livestock rating or proof of high-waste performance.

What the standard package documents

Aquael’s version row identifies item 120623 as “PAT MINI FILTER.” It shares the extra-sponge model’s stated dimensions of 1.5 × 2.1 × 5.5 in, freshwater use, 2–30 US-gallon range and basic pump/sponge arrangement. The material distinction is package-level: the page names an additional sponge only in the separate 113835 configuration, so do not assume item 120623 includes that extra piece. The product table says mechanical media is included but does not inventory exact replacement foam density, a spare sponge or every seller-box component. If a particular sponge is needed, check the offer’s item number and contents rather than relying on a listing that shortens the name to “PAT Mini.”

The volume row pairs 2–30 US gallons with 10–120 L. The lower figures are not direct conversions, so the finder uses the explicitly labelled US-gallon column and preserves that mismatch in the review. The printed range is an initial manufacturer fit screen, not a recommendation based on fish count or waste load. A five-gallon aquarium is within the listed US range; that statement does not establish that the filter suits every five-gallon stocking plan.

The flow figures should be compared as printed

The exact US table assigns item 120623 a 119 US gal/h maximum and 400 L/h, while the page narrative also describes a maximum up to 119 gal/h. The paired figures do not convert to each other using US gallons. The same current page lists 105 US gal/h and 400 L/h for item 113835, so the product’s US model table presents different GPH values even though the paired litre-per-hour number is the same. This review keeps Aquael’s figures attributed to their exact rows rather than silently recalculating them. A generic linked manual reports 105 US gal/h and 397 L/h and does not name item 120623; it cannot resolve the current table’s model-specific mismatch.

The front control allows the pump rate to be adjusted, and the outlet direction can be changed. That makes it possible to configure flow direction, but Aquael does not specify a minimum adjusted rate. The page’s maximum is not a measured circulation rate after the sponge, outlet choice or aquarium setup. If an animal needs a reliably low current, the absence of a minimum is a real limitation to check against the exact instructions rather than a value to infer from the control.

Internal mounting, water level and service access

PAT MINI sits inside the aquarium rather than below it, so it avoids a canister cabinet and external hose connection. The US page describes a suction-cup holder and a bracket that can hook over a tank edge. At 1.5 × 2.1 × 5.5 in, the body is compact on paper, but it occupies visible tank space; leave enough room to remove the sponge and reach the pump. Aquael also names an optional sprinkler and MINI UV sterilizer as compatible accessories. Those accessories are not extra filtration modes included in item 120623, and the page does not establish that either accessory comes in the standard box.

The linked multilingual manual’s English section says the filter should be fully immersed and describes best effect with the unit about 3 cm below the waterline. It warns that evaporation lowers the level, so mounting height should account for that change. The same manual explains an aeration hose and regulator as an optional setup, directs the user to unplug before service, and says to rinse the sponge in aquarium water when pump performance has dropped. These instructions are general PAT Mini guidance; the leaflet does not identify 120623 as a distinct electrical edition. It directs the user to the appliance label for rated voltage and frequency, which are not shown on the localized product page.

Media, stocking and comparisons

This filter’s sponge is not a documented loose-media basket. Aquael lists replacement sponge choices for PAT Mini, including standard, CARBOMAX and PHOSMAX types; the company describes carbon sponge as a chemical-filtration option and PHOSMAX as phosphate-absorbing media. The item 120623 page provides no litre volume for the sponge, so the media-basket field remains unknown and the matcher does not treat any minimum-basket request as satisfied. Nor does the 2–30-gallon label or 119-gallon-per-hour headline establish a manufacturer high-waste rating.

Compared with item 113835, standard item 120623 does not carry the additional-sponge wording, and Aquael lists its power and GPH values separately. Neither configuration has a published basket volume. Aquael Turbo Mini Bio is a different internal filter with a listed 0.1 L media container and a 10–80 L aquarium range; that may matter to someone who requires a numeric container measurement, but it is not evidence that its sponge or biology will outperform PAT MINI. The more important first choice is whether an internal pump-and-sponge arrangement is acceptable and whether the aquarium can accommodate a submerged unit and routine removal.

Check the version and electrical label

Before purchase, verify the listing says powered PAT MINI item 120623 rather than extra-sponge item 113835, replacement media or legacy code 107715. Aquael’s linked manual reports 3.3 W for its generic PAT Mini, and a 2024 catalogue lists different wattage for older product codes; those records do not resolve the current US table’s 4.5 W for item 120623. Check the actual device label for voltage and frequency and use the manual that accompanies the purchased version. Confirm sponge contents, mount method, waterline clearance, power-cord routing and removal space. The official page image is associated with PAT MINI but shows an older 107715 carton, so it does not verify a current item-120623 package.

Source basis: Aquael’s US PAT Mini page and version table, the linked multilingual PAT-Mini manual, English operating section, and Aquael’s 2024 product catalogue. Checked 2026-11-01. This is source-based analysis, not a hands-on test or ownership report.