This is not, to my knowledge, a permanent issue. And so I'm not sure how to go about a temporary solution. The city of Columbus is legally obligated to inform residents when nitrates rise above 10ppm. They have not put out any statements. I'm going to call them, and also my landlord? I guess. I've never had this issue so I'm not sure what to do about it, since prior to this the tap water has tested 0ppm up till recently. I thought perhaps my test kit was messed up, so I ordered another, but this is my brand new test kit right out of the box testing our tap: What can I do for a temporary solution? One of my fish is very ill at present (not surprising considering) so I need to go to the store today and purchase water I imagine. So should I be using RO water? Is that okay for temporary use? Or is spring water better for this? x_x Either one I would drip acclimate him to for sure, I'm just not sure what to do for now till the problem is fixed.