On Jan 10, 9:15*am, Tynk wrote:
On Jan 9, 8:43*pm, "Reel McKoi" wrote:

Mixing rainwater 60/40 has worked. The tetras are thriving and no more neons
have died. *I have an endless supply from the tubs under the garage,
outbuilding and greenhouse eves. :-))

It doesn't seem to have had any effect on the plants one way or the other.