Hi there, I wanted to ask this question for my aunt. I’m not very familiar with the protocol when it comes to a fish in cycle as it was never something I considered. However, my aunt is currently doing one. She never asked me any advice before getting the fish so I wasn’t able to warn her off any of the bad advice etc she was given. So basically a week ago she added four male guppies and two female mollies to a tank she had had running for a week. She isn’t 100% sure but she thinks her tank is 60 litres (but possibly 80). Within the first week she didn’t do any water changes and two of her guppies have since died. I was just wondering when performing a fish in cycle, how often and how much of a water change should you be doing to make the water quality liveable? I’ve also told her to look into getting seachem prime and her own master test kit. Oh and to find out what volume her tank is for sure.