Bottle inserts for Kratky hydroponics
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Small plastic cups for growing plants in plastic bottles via Kratky hydroponics. Have an opening for easy refilling.
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- Źródło
- Printables
- Kategoria
- Outdoor & Garden
- Licencja
- Creative Commons — Attribution
These are small plastic parts for easy growing of Kratky hydroponics plants in plastic bottles.
I include three sizes: for narrow bottle throats (21.4mm inner diameter), wide bottle throats (33.4), and for big 6l bottle throats.
If you need custom sizes, I include a FreeCAD model file. It's largely stable if you increase the diameter, but can break if you decrease it, so it's set to 21.5mm at the moment.
I recommend adding 0.3mm to your bottle's diameter if its HDPE or other soft plastic, and add 0.2-0.25 if it's PET. You probably won't need to add anything for glass.
Print settings:
I recommend PETG for easier inserting (and taking out; you won't need to take them out more than once per season though), but you can use good quality PLA too.
No supports or brims needed.
Prints upside down.
There are complimentary funnels, straight and curvy, that fit the refilling opening of these inserts, I'll link them here too https://www.printables.com/model/1722420-curved-and-straight-funnels-that-fit-my-kratky-bot
Bottles, inserts, a funnel, cotton wool, store-bought nutrient solution, and some kind of a propagation tray is all you need for this DIY system for balconies/outdoors. You'd need to get a grow light too if you are indoors.