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Aquarium Guides: Aquarium care tips for maintaining an aquarium that's happy and healthy 

Six Easy-Care Steps For A Healthy Aquarium

  1. Don’t Overcrowd Your Aquarium.
    Start with just one or two fish (up to five is OK, if they are small). Add additional fish gradually over a four to six week period. Your limit depends on the size of the fish and the size of your aquarium. Consult your dealer for a recommendation.

  2. Don’t Overfeed Your Fish.
    Feed them a small amount twice a day — only what they can eat in less than five minutes. Food that isn’t eaten will pollute the aquarium.

  3. Replace Your Filter Cartridge.
    To keep your water clean and odor-free, replacing your filter cartridge every two to four weeks is best.

  4. Change Your Water.
    Every time you change your filter cartridge, change at least 25 percent of the water in your aquarium, but never change more than 50 percent. You’ll need to replace any water lost to evaporation, too.

    IMPORTANT: The chlorine and chloramines in regular tap water can kill your fish. When you add new water to your tank, always be sure to treat it first with a water dechlorinator.

  5. Vacuum Your Gravel.
    With a standard gravel washer, you can vacuum away dirt and uneaten food as you change the water.

  6. Clean Your Aquarium.
    Algae growth is normal in any aquarium. To remove the algae, wipe the inside walls of your tank with a pad designed specifically for aquarium cleaning. After you’ve cleaned the inside, use a clean, soft towel to gently wipe the outside surfaces.