Matt you could have said you knew about fish.My sons nine and i killed all the fish we bought with ro water.
I did tell the shop and they said fine, purer the better.Waited a week, bought fish, fish all died.
shop tested water, made me refill with tap, this is week two, last week water failed test. This morning we go again to test water and buy fish. He wants three mickey mouse and two of the other sort.(litttle tough ones)