I am not familiar with "rally" but as I said, ALOT of Ich treatment chemicals contain copper. Once added to a tank, it can kill your inverts...even long after you even added it. I know of one person who used a copper-based treatment on her tank and even a year later she could never keep inverts alive. We drained it out, washed all the equipment, rinsed the lace rock and prayed we got it. Started it back up, let it cycle and now she has a huge stock of inverts who are as happy as can be.