HELP!! What Did I Do?!??!

[Beverly]

Just did a quick siphoning of the crud in the 120g and replaced the carbon with foam. Found 17 dead snails, many of which were the new ones I had shipped from J&L last Monday There were also several dead snails among the ones we'd had around for awhile One good thing is that the two strange hitchhiker snails are still around

The snails that were shipped came in bags full of snail poop and with very low pH. Didn't test the shipping water for ammonia, but I'll bet it was relatively high with all that poop. All the snails that were shipped were alive when they got here and after I put them into the tank, so I'm tending to rule out ammonia as a cause of death in my disaster