[Bernd Bussler]

True, pure tap water can quickly bring Paros to its limits, so I only use mixed water, with low Ca value. But you have to remember that I partly 30 30 animals in 30 L water pull up, yes have only small aquariums, since it is already very important that a certain water stability is given. So always well weigh whether it is absolutely necessary. For at any time this process must be reversed, at the latest when one wants to breed and this always means an immense stress for the animals.