tetra recently came out with a product that is supposed to make it so you dont have to do water changes for six months... now thats a disaster waiting to happen.
if you had a drought and there wasnt any water, you should worry about yourself first. your fish can go without a water change for a couple of weeks if there isnt any water, but you can only go a couple of days without water.
if you had a drought and there wasnt any water, you should worry about yourself first. your fish can go without a water change for a couple of weeks if there isnt any water, but you can only go a couple of days without water.