Pump/power that fits python

I want to save more water during water change. Using the faucet suction as a way of vacuuming water seems wasteful to me. I understand that I can do other tubing and power/pond pump to pump out water to a bathtub but I'm wondering if there's one that would fit the python threading/tube diameter.

 

If the tub is lower than the tank, you could just siphon the water out without a pump. There are vids online showing how to start a siphon without sucking on the tube.

 

If the tub is lower than the tank, you could just siphon the water out without a pump. There are vids online showing how to start a siphon without sucking on the tube.

I think two tanks are slightly higher than bathtub. Think of a table verse a tub drain. I also don't know if gravity offers enough suction for the python to pick up the large debris.

 

I have a sink in the basement just down the stairs from my aquariums.

Now all I need is the mojo to go to the hardware store and buy the hose.

 

I am quite sure all parts needed to connect a hose to a sump pump are available at Home depot or Lowes or any other hardware store.

I need to think about this... more. how to vacuum like this, not just change water..... yeah. https://www.amazon.com/NICREW-Elect...QPRPJBJ/ref=pd_lpo_2?pd_rd_i=B07QPRPJBJ&psc=1

this, then adapt the output to a hose to your tub. no bypass water waste. Probably a little slow for water changes on a large tank,. but looks like a decent gravel vacuum option. I'd still suggest a sump pump for draining and the python to refill with as the fastest/easiest options, but this product looks like it would be quick and eliminate the bypass waste water the python creates for the suction.