As my Rio180 is in my bedroom,
I use a Fluval3 head with a dedicated hosepipe bought specially for the job to empty the water from tank to bath,
I set the head to the water height I want to remove so it's not possible to take too much out.
When it's time to refill, I attatch the pipe end that was emptying into the bath, to the electric shower outlet pipe,
set it to 30C and low flow, then off we go
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Dechlorinator in the tank 1st of course. Easy peasy, no fuss, no mess.
Before emptying, I hoover the substrate thoroughly, taking my time ( it's quite relaxing
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
)
agitating the sand a little with a spare fish net to help kick up any buried poop. Works really well.