Ok basically I have a lot of pest snails and I'm really getting sick of it. I have "Rid A Snail" It's a bottle of blue stuff basically but according to the instructions it will harm my invertebrates. So my plan is to remove my ghost shrimp & mystery snails and put them in breeders in my crab tank for the time being.

Here's my question: How long should I wait to return my invertebrates to the tank? And do I need to do a water change first? What percent?