Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

STRONG MAGNETIC : Made of strong rare earth magnet, durable and convenient. Stronger and more powerful magnetic force. Just move the outer magnet, the inside magnet follows, cleaning the floating algae faster and easier. Suitable for fish tanks with thickness of 1/4 "~3/8 " FLOATING DESIGN: The internal floating avoids the brush sinking in the bottom of aquarium. It floats in water and never sinks to the bottom of the tank if separating, makes it convenient to take it out of the tank ALGAE SCRAPER: Install a sharp blade as algae scraper in the head of the brush, which easily removes stubborn marks, even if around corners. The inside anti-scratch cleaning pads cleans fast and efficiently without scratching the aquarium glass

Perfect for quick water changes Efficiently separates debris from gravel Self-priming, using an up and down motion to start water flow

🐠【Sand Washing and Droppings Cleaning】This aquarium gravel cleaner is automatic electric operation which saves time and effort than manual operation. It is your ideal choice. The fish tank siphon can be used to remove any uneaten food, detritus and droppings that are trapped in the gravel which can be fatal to aquarium inhabitants if not removed. The power cord of this vacuum cleaner is 197 inchs long and the hose is 81.5 inchs long, which greatly increases your convenience. 🐠【Electric Working Principle】The greater suction power of the all-copper motor in this aquarium gravel cleaner which is used with impeller supercharging technology. Please remember you need to completely submerge the motor in the water first, then press and hold the start button, the impeller starts to perform a powerful work for your fish tank. If your fish tank is relatively small, when the motor is turned on, you can also take out the submerged motor from water to work. 🐠【Filtering and Water Changing Function】Using the filter housing of this gravel vacuum for aquarium , you can drain clean water directly back to the water tank. The filter material can be cleaned and used multiple times, or it can be replaced with other filter materials. Using a water pipe, water flows directly from the water tank. You can also replace and add water. It is safe to use, equipped with an external independent switch, the adapter is DC 24V, and the power supply is UL certified.