Tragedy struck my tank. I lost all of my poor fish to what has been diagnosed as internal parasites of some kind. I'm still new to fishkeeping, so I had no idea about what could have been causing my fish to act strange and I caught it too late. I don't want to give up, so I'm following the advice of the lfs employees (I know but they seem to know their stuff and haven't really led me wrong yet). They said to let the tank sit for a month or so with no fish, which is fine because it gives me a chance to work on a shrimp tank I've been wanting to build, but I want to be sure that if I do add fish in a month or so the water will be safe for them. So my questions are: will leaving the tank fishless for a month or so eliminate the risk of parasites being in the water? Also, how can I make sure the cycle is maintained without the fish, if that's possible? The only inhabitants left in the tank are some plants and three nerite snails. Thanks for any advice you can offer!