Rainwater.
Collected from my roof(roof tiles are slate so basically inert) , i have about 450litres capacity(100 gallons roughly).
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Rain Water (as much as possible)
R/O water
Purified (purchased drinking water)
Tap water
Well water
Mixture of some of the above
Water?? Maybe THAT'S why they always die!!
Rainwater.
Collected from my roof(roof tiles are slate so basically inert) , i have about 450litres capacity(100 gallons roughly).