This is the problem, If the water is too hard they cant moult.My pH is high and my water is hard,
I've tried them and now I'm determined to get a colony going in my new nano tank.
You might want to consider 50/50 distilled water and tap water. You can buy the water 4 gallons should last you for a few changes.
Our local shopping center has coin operated water dispensers.
If you are in the US, Whole Foods have a reverse osmosis water machine at $ .35/gallon (about 3.7 litres).
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