Bleach Stone Hopper

The Bleach Stone Hopper is a power-consuming refinery building that converts Salt and Gold into Bleach Stone and Sand. It draws 480 W and can run unattended when supplied by an Auto-Sweeper, so it is well suited to fully automated production lines. Its recipe takes 40 seconds and consumes 30 kg Salt and 500 g Gold to produce 20 kg Sand and 10 kg Bleach Stone.

Its main advantage is that it produces Bleach Stone without requiring Chlorine Gas. That makes it useful on asteroids without a Chlorine Gas Vent, since it still allows geotuning and other bleach-stone-based workflows. The Bleach Stone it produces can also be used as a chlorine source through natural sublimation, making it valuable for sanitation setups, disinfection chambers, pressurized stables, and greenhouses. In practice, it is also a good way to turn Salt Water Geyser output into something more useful, since the salt can be fed into geotuning loops and converted into surplus Bleach Stone.

A few practical details matter when using it efficiently:

• Unlike buildings such as the Kiln, the Hopper does not drop all output into one tile. Instead, after each completed craft it ejects both products in 2000 g chunks from the top, throwing them to either side.
• Because the output can land in multiple nearby tiles, an Auto-Sweeper should be positioned to cover all possible landing spots.
• If the sweeper is left running continuously, it may waste power repeatedly collecting small amounts of output. Using a Timer Sensor to limit pickup cycles reduces idle energy loss.
• The Bleach Stone it creates can release Chlorine Gas when left to sublimate, but the emission rate may be too low for constantly demanding consumers such as Dasha Saltvine. It is still more than sufficient for sanitation and plant-growing uses.
• Since the machine itself is power-positive only when paired with a suitable power source, many players use geotuned geysers or other surplus power setups to keep it running full-time.

The machine’s output behavior also means that environment control matters: once the Bleach Stone lands, it can begin off-gassing Chlorine Gas, so pressure management around the production area can be important.