Actually the previous poster is wrong. You don't need to keep sucking, you only need to do it once. If you fill the tube partially and then put it into a bucket below it will keep flowing until the water tank is entirely empty because of the siphon effect. (For that matter the manga has it wrong too. https://youtu.be/H6E92hhiWf8?t=1m30s is how this actually works)
That's so cool! But isn't there a faster way to do it? Seems inefficient to me.
Why are they sucking the aquarium water? Isn't a pail better suited than that?
Probably to bring up the water, when the hose is full they will release the suspended liquid onto the pail. The aquarium is placed in a higher ground so it will be impossible to get rid of the water unless they are allowed to use a dipper or actually tilt the aquarium.
The series recently ended at chapter 80 and it caught me off guard to be honest. It feels kinda empty to have a story that I was used to having around to be gone before I know it. That being said, I am glad it got, what seemed to me, a more less proper ending as compared to White Angels Have No Wings.
I read the translated afterword and I'm pretty sure the author's just taking a break because of personal reasons and will continue the series. YEEEEEEEEEEEEEEEEES
