Petco Aquarium Maintenance

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Related Articles & Questions

Care Sheets
Rainbow Fish Care: Tank, Food, & Compatibility for Thriving Pets
Learn how to care for Rainbow fish, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
Aquatic Pet Owners: Stop Invasive Species, Save Our Waterways
Read about Habitattitude and Petco's commitment to protect our environment. At Petco, animals always come first. Learn how you can help.
Updated on October 23rd, 2025
Care Sheets
Foxface & Rabbitfish Care: Tank, Food, Compatibility, & Venomous Spines
Learn how to care for Foxface fish & Rabbitfish, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
Guppy Care: Tank Setup, Feeding, & Compatibility for Beginners
Learn how to care for Guppy fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on April 9th, 2026
Care Sheets
10 Best Schooling Fish: Care & Setup for a Thriving Aquarium
Choosing the right schooling fish is essential to creating a thriving freshwater aquarium. At Petco, we carry a wide variety of small and large schooling fish great for any aquarium.
Updated on October 23rd, 2025
Food & Nutrition
New to fish? What are the easiest fish and tank size for beginners?
Guppies or Neons are excellent "starter" fish. Care is simple and they are inexpensive. A standard 10 gallon tank is recommended to start. Most people don' t realize the amount of "work" needed to maintain a tank. Filter maintenance, monitoring water chemistry, water changes, monitoring fish health and providing a balanced diet are just a few items that need regular attention to keep a tank thriving. Even though fish aren't as cuddly as cats and dogs, they do have their own personalities and even respond to their owners, especially at feeding time! Studies have shown that simply watching fish in a tank can lead to a reduction in both heart rate and blood pressure. It is quite relaxing.
Updated on September 24th, 2025
Vet Q & A
Why are my fish gasping at the surface after cleaning the bowl?
Begin by submitting a water sample for quality testing. Most pet stores will do this for free or a nominal fee. High ammonia levels, PH imbalances may be responsible for that. Oxygen concentration and quality of the filters should be determined as well. Lack of oxygenation could be the cause of it. If water quality is good and there are no major imbalances, Bubbles should examined to look for any sign of bacterial/fungal infection and eventually water should be treated. Please do not hesitate to contact us again on the forum or by requesting a consultation (where you can post pictures ) if you have any more questions or to discuss it any further.
Updated on September 24th, 2025
Vet Q & A
When should I change my aquarium filter for a healthy fish tank?
How frequently to change the filter depends on what type of filter you have. There are mesh filters that filter large particles of uneaten food, feces, etc. - these often just need to be rinsed to remove the material and that is it. If they get damaged in any way, that is when they need to be replaced. Other filters that remove toxins - often carbon filters or ammonia filters, have a set time frame that they should be changed with. This time frame is often set by the manufacturer, and usually ranges between 1-3 months, but you can look at the package or talk to the pet store where you purchased it for more guidance. The biological filter, which is made up of a surface for bacteria to live on, usually don’t need a great deal of cleaning as you can kill all of the good bacteria. I hope that helps to answer your question - if you need further assistance, I would recommend a store with fish experience, or we can do a consultation together here as well! Good luck!
Updated on September 24th, 2025
Training & Behavior
Is my 90L fish tank big enough for my fish to be comfortable?
Thank you for using Petco Pet Education Center, formerly Petcoach! It looks like the tank provides enough room for Speedy and Explorer to swim comfortably. Keep an eye on them, and move them into a larger tank if they get significantly larger or you notice signs of fighting or increasing ammonia levels in the tank.
Updated on September 24th, 2025
Vet Q & A
What fish can I put in a 3-gallon tank, and how to change water?
The small size will limit the species of fish as well as the number. White Cloud Minnows or Guppies would do fine in a small tank. You could keep no more than 2 or 3 fish total. If you are looking for company for your Betta, the same species can be kept. Other options include Otocinclus (Otos), Corys, Platys or Harlequin Rasboras. Again, no more than one or two in addition to the Betta. Water changes for any tank are simple. Change no more than 30% total volume at a time. Use a water conditioner to remove harmful chemicals and make sure the water is temperature matched to prevent stress or shock. Rinse the filter in tank water, not tap water, to preserve beneficial bacteria. Vacuum the substrate every couple of weeks.
Updated on September 24th, 2025