A terrible thing happened today and I need some fellow monster fish keepers to help me figure it out---please.
I have 11 tanks up, all filled with different kinds of fish. About 6 months ago I needed more gravel so I went to a local landscaping yard and bought some. Washed it thoroughly and put it in 2 different community tanks. No Problems, all fish happy. Recently I decided I wanted more gravel in my 125. This is (was) a healthy established tank containing 3 full grown South American Cichlids, a pair of Midas and a female Red Devil. She was the bully but all 3 were generally happy. I went to the same landscaping yard, bought the same gravel, wash it thoroughly and put it in the tank. Everything was fine. I noticed about an hour later that they were listless another hour and the Devil was dead. I scooped up the 2 Midas and dumped them in my 100 gallon African Cichlid tank. I didn't know what else to do??!! That was about an hour ago, they are not dead yet but they DO NOT look good. I have been in this hobby for over 40 years and have never had anything like this happen before! Anyone? Any thoughts? Suggestions? Anything? ----this has totally blown my mind 
I have 11 tanks up, all filled with different kinds of fish. About 6 months ago I needed more gravel so I went to a local landscaping yard and bought some. Washed it thoroughly and put it in 2 different community tanks. No Problems, all fish happy. Recently I decided I wanted more gravel in my 125. This is (was) a healthy established tank containing 3 full grown South American Cichlids, a pair of Midas and a female Red Devil. She was the bully but all 3 were generally happy. I went to the same landscaping yard, bought the same gravel, wash it thoroughly and put it in the tank. Everything was fine. I noticed about an hour later that they were listless another hour and the Devil was dead. I scooped up the 2 Midas and dumped them in my 100 gallon African Cichlid tank. I didn't know what else to do??!! That was about an hour ago, they are not dead yet but they DO NOT look good. I have been in this hobby for over 40 years and have never had anything like this happen before! Anyone? Any thoughts? Suggestions? Anything? ----this has totally blown my mind 
