The main way to keep a fish bowl clean is to change some of the water in it. However, this process can stress or even kill the fish by disrupting the bacterial and chemical contents of the water. Follow this guide to keep your bowl contents healthy without changing the water unnecessarily often. Do also keep in mind, that round containers such as bowls have been known to stress fish out and shorten their life. Yes, they can survive in a bowl, but they will not be truly happy. :  Clean 0.5 gallon (2 liter) bowls daily, 1.5 gal. (6 L) bowls three times a week, and bowls 3 gal. (12 L) and up twice a week. Ammonia levels rise quicker than you may know it. If your bowl has a filter, then you can cycle the bowl (which might be hard considering bowls are tiny and not humane), then you can clean the bowl once a week. Don't ever clean the bowl once a month. If the bowl is big enough, then you can keep the betta fish in the bowl while you clean it and change 50% of the water. Doing that will help the betta fish to not be stressed. During the cleaning and water change, you'll remove about 20%–25% of the water in your fish bowl. The replacement water should be prepared at least 30 minutes in advance, to allow time for treatments to work. You may use tap water, distilled water, or rainwater, but be sure to follow the advice below to make it safe for your betta. Leave this out at room temperature in a clean, soap-free container while you clean the tank. Do not use rainwater in an area with acid rain. This is sold at pet stores as "dechlorination tablets" or "water conditioner," and are used to break down chlorine and other chemicals harmful to fish. Add this to the tap water, following the instructions to treat the amount of new water you are adding. This usually takes at least 30 minutes to take effect. Skip this step if using distilled water or rainwater. Aquarium salt for betta fish or goldfish can be added but is never recommended for long term use. Aquarium salt is not in fish's wild habitat, so is not recommended. This step is only recommended if the water in the bowl is 100% distilled water. Betta fish are tropical fish, and prefer temperatures around 74–82–F (23-28ºC), or just a little warmer than "room temperature." If the new water is not near this temperature, or if it feels colder or warmer than the water in the fishbowl, leave it in a warm room until it reaches a safe temperature.
حدد عدد مرات تنظيف الحوض. اختر المياه الجديدة. أضف مزيل الكلور إلى مياه الصنبور. أضف الملح الخاص بأحواض السمك (اختياري). تحقّق من درجة الحرارة.