So about a few weeks ago in my lionfish died of an eye infection. I was wondering if the aquarium water was still ok to use or if I take out like 50% would that be better, or does it all need to be all replaced. He was the only fish in there. Also about 1/4 the water has evaporated and the salinity is about 1.041 I don’t know if that makes a difference on the survival of any bad bacteria.