I got 7 striped Kuhli Loaches from Aquatic Arts two days ago. I saw one behaving oddly this morning, and I was concerned. I did a full panel of water tests, and everything looked normal. However, I just found one dead loach and another one is not looking so good. The other 5 are MIA at the moment. I threw in some Seachem Prime out of desperation. I examined the dead one, and I see nothing out of the ordinary. Here are my water parameters...
Nitrate: 30 (this is the level in my tapwater)
I've just returned to the hobby after a long absence, and I haven't dealt with sick fish in many years. Does anyone have any helpful thoughts?