Freshwater fish are perhaps the easiest fish to maintain compared to saltwater species because they are generally more solid fish. It will require the establishment of a basic water basin. You will need a tank, rock or substrate to line the bottom of the tank. You will also need a filter and lighting. When choosing the fish, it is necessary to ensure the compatibility of the fish. Not only must they be compatible with the temperature and pH of the water, but they must also have similar nutritional requirements. Try to keep the fish relatively similar. It has been said that if a fish is small enough to fit the mouth of another fish, it usually ends up being so. So don’t be discouraged if this happens. Even the fish grouped together several months ago have sometimes disappeared.
Freshwater fish should be fed twice a day. Feed only a small amount that can be consumed in the first two to five minutes. Overfeeding is a common mistake for novice fish farmers. If possible, any excess food should be brought into a net, as it will become debris and the pond will get dirty quickly. Water should be organized and tested weekly. Any difference in pH and water temperature should be corrected immediately to reduce stress caused by the fish. Stress is important because it causes illness in fish. It is important to monitor the activity and general well-being of the fish in the aquarium. The signs of stress will be somewhat clear. Slow or inactive fish require the purchase of a pressure coat from your local pet store. Try to avoid overcrowding in the tanks. This should help reduce the stress caused by the fish.
Change about a third of the tank water at a time, as this type of change will cause as little disruption to fish and other residents. This should be done every two to three weeks. Use a bucket or siphon to remove water from the tank. Try to remove any loose or floating debris at this point. When adding fresh water to the tank, make sure it is about two degrees from the tank water. The sides of the tank should be cleaned regularly to remove algae buildup. Again, be careful not to disturb the fish. Wash your hands thoroughly before and after handling the sink. Finally, check the manufacturer’s recommendation for the filters and change them accordingly. Filters collect fish waste or leave it on food. They can only work properly if they are clean.
Bring hard fish in a new tank. These fish can withstand higher levels of nitrite in the new aquarium. Choose fish such as danios, barbel, gouramis. Do not add more than three to four small fish per week. Adaptation times vary by species, so check with your retailer before adding any new fish.