I bought new plants from pets at home and some shrimps. I put the plants straight in along with the shrimps. Unfortunately pets at home failed to mention they use pesticide on their plants and it completely wiped my whole shrimp tank out. I know it makes sense to wash them but iv never been told this before ever and it id their job to infofm me of this especially selling shrimp to me along with the plants! Anyway my question is what do I do with the contaminated tank? Iv took the plants out and they are mow soaking in cold tap water. How should I treat the tank before adding new stock? Thank you