VAYINATO Aquarium Water Repleniser Auto Top Off Cap Corner Type Used with Any Bottle Aquarium Tool

???HOW IT WORKS?--- When the water level drops to reveal the shorter tube, the water in the bottle automatically flows into the tank due to pressure difference. ???SCREW FREE?--- no damage to the tanks. Made of corrosion-resistant ABS material, which is also usable in saltwater. The length of the tubing (manually cut) allows you to adjust the water level. ???SUITS UPTO 10MM?---Suitable for tanks with 3-10mm /0.12-0.39in wall thickness. Note: Incompatible with rimmed tanks and curved fish tanks; and tanks with 3mm/0.12in or 5mm/0.2in thickness wall need to use the self-adhesive gasket (included). ???A MUST NEED GADEGET DURING VACATION?---A reliable gadget during business trips or travel. Compatible with fish tank, tortoise tank, planted aquarium, saltwater aquarium, etc. For tanks longer than 40cm/16inch, it is recommended to use 2 refillers together. ???GREAT FOR NANO TANKS?--- It Use with the principle of differential pressure to automatically refill water, simple and practical. You need to prepare 0.5-1.5L (16.9-50.7 FL Oz) any plastic water bottles