From which store did you purchase the checkerboard snails? I need something that does that kind of work. My urchin is just not cuttin' it. I would take a couple of those and turn them loose in my tank and they could strip all they wanted. I wish something in my tank would do that!
I bought the snails from Jerry at Atlantis Aquarium at the intersection or Old Canton and Roswell Road in Marietta. He said that they are his most popular snails because they are (1) pretty and (2) good cleaners. He is definitely right no both counts. I was surprised at how deep these snails clean the rock, they really take it down to bare bones. Don't I want "some" base layer of algae on my rock or is this "strip-clean" what I'm after?
As for the fire shrimp, how long did you drip acclimate it? I would suspect that, with such a sudden death, you may not have acclimated properly? Also, you did put in a very large bioload so there could be something in the water that's just not showing up on the test.
I have two fire shrimp and the other one looks healthy. I put them in my tank Saturday morning so they have been doing great for 4.5 days. I put them in a bowl with their bag water and ran a drip line for a total of 45 minutes, and double the water volume, to acclimate them before I put them them in the tank. I did put in a pretty big bio-load all at once. Probably too fast but I got a little carried away.