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Related Articles & Questions
- New Pet
Aquarium Water Quality: Master Healthy Fish & Crystal Clear Tanks
Learn how to test your aquarium water. Poor water quality stresses fish, which leaves them susceptible to disease and possibly death.
Updated on November 13th, 2025
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Live Rock & Sand: Setup, Curing, & Care for Thriving Reef Tanks
Learn how to care for live rock & sand. Live rock serves as a platform for coral and invertebrates and provides a surface for beneficial bacteria to live.
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Complete Ricefish Care: Setup, Diet, & Habitat for Thriving Fish
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High Nitrates in Your Fish Tank? Protect Fish Health & Prevent Deaths
Search Petco to find out the harm of high nitrates in freshwater fish aquariums. We provide vital information to help keep your fish happy & healthy.
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Damselfish Care: Expert Tips for a Thriving, Healthy Fish Tank
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- Health & Wellbeing
What is the best way to clean a fish tank? Am I allowed to remove the fish so i can clean it more properly?
Hello, and thank you for using Boop by Petco. The most common (and easiest) way to clean a fish tank is with a siphon-style cleaner. Fish tanks should be cleaned in stages, generally replacing 10-15% of the water at a time. There are times where a larger cleaning might be necessary, but removing the fish and changing too much of the water at once can be quite a shock and can be dangerous to the fish, so this should be saved for only extenuating circumstances. Here's a helpful video on using a siphon cleaner: http://video.petco.com/v/18852/how-to-clean-your-aquarium-with-the-aqueon-siphon-vacuum-/ And some more reading you may find interesting on general fish tank cleaning and maintenance: http://www.firsttankguide.net/waterchange.php Hope this helps!
Updated on August 12th, 2025
- Health & Wellbeing
Hi, I just got a fish from a friend and I don’t rlly know anything about that fish, it’s rlly small(about 4cm) and I want to know the breed of the fish and how to take care of it. Thanks you
Thanks for reaching out about you fish. It is believed to be a Comet goldfish. Water quality and nutrition is the key to success. Testing water parameter for pH, ammonia, nitrite and nitrate will give you guidance for a healthy environment. Purchased food should be rotated out every 3 months as vitamin C and other nutrients degrade over time. Trying to maintain water temperature can be challenging with out a heater, but most fresh water fish tolerate some changes. Good luck.
Updated on August 12th, 2025
- Health & Wellbeing
My 5gal goldfish tank (for a 4 in goldfish) is currently at a really low pH (6.0-6.4). What is the ideal range for goldfish, what is the best way to alter the pH and how gradually does the change need to be.
Here is a helpful link: https://www.aqueon.com/information/care-sheets/goldfish Your local aquarium store will likely carry a powdered product to add to the water to increase the pH. The package will have dosing instructions. I hope this helps and please feel free to post any additional questions.
Updated on August 12th, 2025
- Health & Wellbeing
Can use mineral water for aquarium. My tap water has lot of heavy metals. I have 10 galloon tank with 4 guppy 4 danio 1 silver dollar. 1silver dollar and 1 pleco died bcoz of 2 gold fish earlier in my tank. So i decided to use RO water. Can i use.
RO water is devoid of minerals and trace elements that help stabilize pH and other parameters. If you can add these after filtration then use your RO water. Otherwise, RO is commonly used to "top off" fish tanks that lose water via evaporation.
Updated on August 12th, 2025
- Health & Wellbeing
Hi, So i am planning in keeping goldfish in my living room. I read that the tank need to be cycled 1-2 months before the fishes arrive. To introduce good bacteria in it. But I don’t want to wait that long, can i just put beneficial bacteria product
Hi and thanks for your request. To better control Nitrite and ammonia spikes it is best to cycle it for a month at least and measure nitrites, ammonia and nitrate constantly. Please follow the recommendations here below: The nitrogen cycle is the process of various bacteria converting harmful waste. It involves 4 steps: The first step is the decay of waste products of fish, plants, and invertebrates, along with any dead organisms or uneaten food. As these materials decay, ammonia is produced, which at even low levels will burn the gills of fish and choke off their oxygen supply. Bacteria called Nitrosomonas consume this ammonia and, in the process creating another chemical byproduct called nitrite. Although nitrite is toxic (preventing blood from carrying oxygen), fish can withstand roughly twice the amount of nitrite in their water when compared to ammonia. Next, other bacteria called Nitrobacter consume the nitrite and, in turn, release a less toxic chemical called nitrate. Nitrate
Updated on August 12th, 2025
