I suppose it is possible I've heard of bad things riding along w/duckweed. Hydra comes to mind.
I'm very sorry you lost your shrimpies! I can't honestly think of anything else unless maybe the tank had been used for fish at one point and were treated for ich. Unless you have copper or heavy metals in your pipes. Or the water they came from was drastically different from your water.
I'm very sorry you lost your shrimpies! I can't honestly think of anything else unless maybe the tank had been used for fish at one point and were treated for ich. Unless you have copper or heavy metals in your pipes. Or the water they came from was drastically different from your water.