Kevin, are you still having ammonia and nitrite readings? Your tank is still cycling. Clamped fins on your livebearers indicate poor water, so you just need to increase your water changes. Make sure you add a good dechlorinator when do water changes (Prime). You are leaving the filter alone, right? I seem to recall you are doing a tube/hose water change. Are you turning off the filter when you do that and adding dechlorinator to the tank beforehand--and not overdoing it with that? Could you remind us of the size of the tank, your current reading for ammonia, nitrite, nitrate and pH, and the current contents? You've had more than your share of trouble lately. Also, if you can get a photo of one of the silver dollars with ich, that might help--in case it isn't ich.