Fresh water is very important for cavies. You can create a blend by adding supplements to it that can be beneficial. Be aware that adding anything to your cavies water can cause a change in taste. This may result in them reducing their intake. I like to provide the supplemented water in an additional bottle, so my cavies still has access to plain water as well. Supplemented water should be disposed of at the end of the day. In hot weather this should be done even sooner to avoid undesirable bacteria growth.
