I use one of these reverse osmosis systems (they also come with a higher flow rate). It connects to my outside tap and produces 5 litres in approx 45 minutes.
https://www.finerfilters.co.uk/finerfilters-aquarium-3-stage-reverse-osmosis-unit-for-tropical-fish-marine-discus-50-gpd.html
New interesting seedlings ;)
Werewolf x werewolf 022 - traps have no trigger hairs so its non carnivorous venus fly trap. Traps have strongly developed lower part, which is also bent upwards.
Werewolf x werewolf 014 - shape of plant and traps is similar to werewolf but it have micro teeth