By 301, can you specify the filter in question?
Eheim double taps are good for quick and "dry" release. They come in 2 hose sizes. You can place them anywhere along the intake and output tubes though if you intend to do servicing often on the filter, then the closer it is the better. I use 2 x Eheim double taps for my Eden 501. They are bulky but there's nothing else in the market that can do this, except maybe those Hozelock stuff.
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