Originally Posted by otgarza
I got rid of the jack dempseys for the time being my friend is holding those in his 50 gallon (only two because we recently returned two because we made a pair) while I get my 80-90 gallon tank. I got my water tested today and everything seems to be fine except for the ammonia levels being 0.2. Which indicates stress and also the water was slightly hard. I have done a water change today and will probably do so in the next few days. I will get a test tomorrow also to check on the ammonia levels again.
I watched the fish for awhile and I noticed that he moves all of his fins to swim except his caudal fin. It seems that he tries to move it but just can't do it. Also the anal fin is starting to get black spots on it also and his gills are black but not as dark as they once were.
I also noticed during the water change that the water had a strange smell to it that my other tank has never had. And that there was a few areas where the water seemed murky or thick. I believe it could be the gravel perhaps because its much bigger, and food and waste don't seem to go under the gravel it just settles above it. Should I also change the gravel? I bought the gravel at walmart and this isn't the first time I've heard of murky water with gravel bought at walmart. I really appreciate the help!
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Smell could be indication that filter needs cleaning and vaccuming the gravel would help.
Ammonia levels above zero are stressful to lethal for fishes and who is to say that at some point during the day that the ammonia levels do not increase such as after feedings.
Twice weekly water changes of no less than 50 percent as mentioned earlier will provide much better conditions that favor the fish.
Reducing the amount of food offered to once each day, and only as much as you actually see the fish eat in a couple minutes will also help prevent excess food = ammonia from laying about in the tank.
feed the fish,,not the tank.