I lost my purple firefish and my really old grumpy ass yellow watchman goby at about the same time.  Both fish seemed to reside on the bottom portion of the tank and just noticed my skimmer had stopped working, not sure how long it's been off but it's going now again atleast.

Anyway, I have very few nitrates but was wondering if Ammonia could be the culprit for my fish loss.  I think something is going on being they both died around the same.  I really don't think Ammonia is the case but the only way to tell is by testing.  Just thought being i just need to test once instead of buying a test kit I would see if someone would let me borrow one.

I'll be back in town around 5-6. I'm pretty positive I have one, I'll let you know when I get back if you don't have one by then.

Thanks dude, maybe I'll just bring some water by and check out your tank(s) if that's cool with you.

Sounds good, I'll give you a call when I get back.