就是这个                                                                       
http://www.petco.com/Shop/Product.aspx?R=37&Nav=1&N=0&Ntt=No%20Spill%20Clean%20and%20Fill&sku=78123&familyID=2762&                                             

                                                                               
感觉它的原理还比较简单, 不知道能不能买到材料自己做一个                         
                                                                               
主要我们家的缸离水龙头远了.如果买一个15m长管子的都要40块钱了                   
                                                                               
另外还想问一下有没有专门的养鱼(其实我养的是water turtle呵呵)用品的店,感觉petco 
的东西不够全                                                                   
                                                                               
thx!