I missed the part about the Leo being flipped over. By me, the water company is flushing the mains at this time of year and also have switched temporarily from chloramine to chlorine. I also know a bunch of people in NYC have lost a bunch of fish in the last week or so, it wouldn't surprise me if there's been something going on with their water supply too. I've been dosing a little extra water treatment during my water changes because I can smell the chlorine.
I know you're not in the same area but it's possible the water company by you is doing similar things at this time of year, it would be worth looking on their website or calling and asking.
All this assumes you're not on well water, of course (although spring runoff could also affect well water).
I know you're not in the same area but it's possible the water company by you is doing similar things at this time of year, it would be worth looking on their website or calling and asking.
All this assumes you're not on well water, of course (although spring runoff could also affect well water).