Freshwater Aquarium/Jack dempseys


I have four jack dempseys in a 29 gallon tank. I am currently saving money for a bigger tank for them, but I have one problem. My ammonia is at about 2.0 ppm, I have done a couple water changes and put water conditioner in. I can not figure out how to get it down or what to do. If you could give me any information, I would appreciate it. Thanks

Hi Daniel

The only way to control ammonia is with water changes. Do 15% water changes every couple of days until the ammonia comes down. Make sure when doing water changes that you use a gravel vac to siphon the gravel to remove excess food and waste. Don't waste your time or money on ammonia control chemicals, they do not work. Change the carbon in your filter every couple of weeks. When you get the ammonia under control, then do 25% water changes once a week.

Hope this helps, good luck!


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Richard Hight


I own and maintain several freshwater aquariums from 2 to 180 gallon. I can answer most questions about freshwater aquariums, including setup, cycling, maintenance, compatible tank mates, feeding. Moving? I've moved fish both across town and across the country and can help you get your little aquatic friends to their new home safely. I know and have experience with most freshwater community fish, South American Cichlids and African Cichlids. I don't answer questions about Goldfish or keeping Goldfish with Tropical Fish. I also don't answer questions about keeping crustaceans (shrimp, snails, crabs etc) with Tropical Fish, nor questions about saltwater fish or aquariums. I'm not available to answer questions on weekends, this is when I do maintenance on my own tanks.


Many years of personal experience with community tank fish, semi-aggressive fish (Barbs, Tetras, etc), Angels, South American Cichlids and African Cichlids.

HSG 2010-2011 prof

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