Dear friends: Thank you for your attention to our products ! :)Product performance: feeding fish poop absorption change water meteringColor classification: yellow blue black‐ specification ／Length 28.5 cm ‐ baby name ／ : multi-function mini water changer Sucking fish implementProduct features ／ ‐ red worms、 daphnia、 brine shrimp feed、 sink the precipitation in the garbage and remnant removal、 etc.、 large dropper PVC material is not easy to damage.Can be adjusted as water agent、 nitrifying bacteria、 seaweed liquid adding dosage tools such as effects、 52、 is very convenient.‐ features ／Clean up trash mini fish tank at the bottom of the precipitation low dirt、 residual feed.As a mini fish tank in water、 really have no other tools can replace.Low brine shrimp and red worms、 such as water flea frozen food to thaw after feeding、 feeding of living、 and is also suitable for small particles of liquid feed.Add liquid to a tank additive、 used as a measuring tool.[usage]Low please wash before using this product.Low head and pipe connection、 confirm the good after use.Breathing in the water dropper、 grasp the strength of the rubber head knead.