we have well water here and even using the water softener sytem the filtration systems failed horribly for us. we were going through filters so fast because of the rust in our water and just not worth it. lucky for us our job brings us to a lot of marathons and we are able to pick up bottled water for free because if they open a pallet or case they can not take it back so for many reasons it is in the best interest for us and the animals to have bottled water. i use regular drinking water and brand does not matter most of the time it is brand name because it is donated for the runners but for us free is free and beggers can't be choosers.