Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Get It Today
Visit Petco to learn about cleanup crews and how they can help your aquarium health.
Updated on October 23rd, 2025
Learn how to care for soft coral, recommended care & habitat setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on October 23rd, 2025
Learn how to care for hard coral, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on October 23rd, 2025
Learn how to care for a pet mollusk, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on October 23rd, 2025
Learn how to care for marine clams, recommended diet and habitat setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on October 23rd, 2025
Thanks for reaching out, the rule of thumb is 1" of fish per 3 gallons, but smaller tanks are very difficult to keep stable, and saltwater fish are easily stressed by environmental fluctuations (salinity, temperature, dissolved oxygen). Good luck.
Updated on September 24th, 2025
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
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 September 24th, 2025
Anytime there is an unexpected loss of fish, water chemistry should be checked. Use a home test kit ( https://www.petco.com/shop/en/petcostore/product/api-freshwater-master-test-kit# ) or submit a water sample for testing. Most pet stores will do this for free or for a small fee. Confirm an absence ( 0 ppm ) of ammonia and nitrites with a nitrate level of 20 ppm. pH can range between 6.5 and 8, water temp should be 65 F to 75 F. If chemistry and water quality are within normal parameters, then illness or aggression would be other reasons for the loss. It is always recommended to quarantine fish in a separate tank for 2-4 weeks prior to adding them to the main tank. During this time, they can be treating for infection or parasites. I am sorry for the loss of your fish.
Updated on September 24th, 2025
It could be a minor bacterial bloom due to the filter not running. You can perform a partial water change, no more than 30%, and run the filter. Use only aged or conditioned water that is temperature matched to prevent stress or shock. It should clear up after a few days.
Updated on September 24th, 2025