At my Mums work they use water for irrigation and she can get it for free would that be ok? I'm currently collecting some rain water would that be okay? and last of all my Dad just said to me what about mineral water so is that okay?

I couldn't find any heavy metal filters in the shops today so need something ASAP.
Thanks Luke

P.S
Also a completly off topic to this thread but I have tricked two of my frogs I completly forgot about my locusts for about 4 days and when I looked at them today 2 were twitching so I thought what a waste it would be if I just chucked them so I got some really thin hay and tied it around the locusts front leg and cut of the excess hay but left a length the other side for me to hang on to and I dangled it in front of my frogs and both got eaten and I just pulled off the hay before it was completly swallowed. Personally I think it's ingenious LOL.