Aquarium or turtle habitat?

A hang-on-back (HOB) aquarium filter with adjustable water flow, an extendable intake, intake sponge and a surface skimmer for floating debris. The filter body sits behind the aquarium and returns water through a waterfall outlet.

Will a hang-on-back filter fit my aquarium?

Check the tank rim, lid opening and space behind the tank before ordering. Leave access to lift out the media for maintenance. Compare your normal water level and electrical supply with the supplied instructions. A tank's gallon size alone does not confirm fit.

Adjust water flow and check sound

Use the control knob to adjust the return flow for your setup. Waterfall sound, air entering the intake and vibration can vary with water level and mounting. This filter is not guaranteed silent or suitable for every small fish or shrimp setup. Check strong flow, air and filter noise.

First start and routine care

Fill the filter chamber with water and prime it as directed before connecting power. Do not assume automatic restart after a power interruption. Never run the filter dry. Disconnect power before inspecting the intake, media or impeller; follow the supplied instructions when reassembling. See aquarium filter setup and care.

What is included?

Filter body, extension tube, filter cartridge, intake sponge and intake tube. Aquarium, animals and decorative items are not included.

Which replacement media should I choose?

This listing is identified by ASIN B0GRX1PM2K. Current listing information identifies the filter as SF-02; its website address retains an older identifier. Check the model label on your unit before buying refills. For a unit labelled SF-02, choose SF-02 replacement cartridges, four-piece pack. Do not choose SF-01 cartridges based on this page's address or assume other models fit.

Cloudy water or unsure about fit?

Visible debris, milky cloudiness and green water can have different causes. Filtration does not replace suitable feeding, water testing and tank maintenance. Read the cloudy-water checks or ask about filter fit with your rim, lid and water-depth details.

One Seaforia ST-01 internal low-water turtle tank filter with one pack of four matching replacement media pieces. Its compact vertical body sits inside the habitat and returns water through a waterfall outlet.

What comes in the turtle filter kit?

• One ST-01 filter unit.
• One four-piece pack of matching replacement sponge clips and filter boxes.

The four pieces are extra refills, not four filters or a guaranteed four-month supply. Aquarium, animals and decorative items are not included.

Will it work at my water depth?

Low-water operation still requires the correct working water depth. A numerical minimum for the current unit has not been confirmed here. Share your normal water depth, actual water volume, animals kept and mounting space with us before ordering for a shallow habitat. Check the supplied instructions and electrical label before connecting power. Never run the filter dry.

Check low-water filter fit or ask Seaforia about your turtle setup.

Setup, flow and routine care

Follow the ST-01 instructions for positioning, first use and priming where specified. Do not assume the adjustable flow control of the hang-on-back aquarium filter is present on this model. Disconnect power before removing or maintaining parts. Check the intake and media regularly; cleaning and replacement depend on the supplied instructions and your tank conditions.

View filter setup and care.

Find the correct replacement media

Match the ST-01 label on your unit before choosing ST-01 four-piece replacement cartridges. SF-series and other ST-series packs are not assumed interchangeable.

Will it clear every kind of cloudy water?

No universal clearing time or algae-removal result is promised. Debris, milky cloudiness and green water call for different checks, alongside water testing and appropriate habitat care. Read the cloudy-water guidance. A filter light does not replace the basking and UVB lighting required by the species you keep.