Got to play faces of death this weekend. Previous 2 weeks had ammonia at the next to last level so was planning on getting some additional occupants this weekend anyway. Brought them home, did another water change and got a 0 reading, added new ones in with the new water. Then got to watch first one die almost immediately, rest not long after.
Upon further examination, looks like the tap water had turned real basic during the hot summer days. After getting pretty much 7.0 every time I checked, hadn't checked that the last times. After the floaties checked it and it was max, tested tap water and the same. So dropped in some ph- and headed to the store for some replacements. As it's the kids tank and in the bedroom, we did not have a happy camper situation when we started going belly up right away. At least we have 4 still happily alive newcomers this morning.
On a happier note, for the saltwater people how do you stock your tank? Was looking at those in the store while waiting and noticed that many had disclaimers about have to be alone with its type or other aggressive or other non-aggressive, or away from reefs on many of the ones they had in stock. Seems to be difficult to have several breeds in the same tank.