In this video I install a cheap 12v ebay water pump and a Dunne and a Watson 40L under tray water tank. I mount the water pump in my under tray box with a waterproof rocker switch.

Dunne and Watson Tank:
https://dunnandwatson.com.au/shop/can...

12v water pump
https://www.ebay.com/itm/DC12V130PSI...

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Liquid Antler!