Originally Posted by enrgizerbunny
You could always just a regular gravel vac/bucket to siphon the waste and finish with the python for the actual volume of the change.
When I siphon out the window in the summer time I have a noticeable loss in suction. My guess is due to the extra distance it has to travel before dropping, unlike the bucket where it goes up and then straight down about 5 feet.
That's been my backup plan. Manually siphon, throw my pump in and drain the tank, then the python to finish it up with the refill.
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