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Welcome to Petco’s saltwater fish store. Pet fish can make wonderful additions to your home and family. At Petco, saltwater marine fish for sale can be delivered to your home or purchased from our in-store Pet Care Center Aquatic Departments.
There you can find many kinds of Petco fish. Our pet fish types include beautiful Blue Hepatus Tang, Dog Face Puffers, Black Volitan Lionfish, Majestic Angel Fish and many other species. When you’re ready to order or pick up one of our saltwater aquarium fish for sale, you’ll want to be prepared with the appropriate home to welcome your pet fish.
Get set up with the appropriate aquariums, kits and stands, as well as fish feeding accessories. You’ll also want to make sure you have suitable aquarium water care supplies for aquarium maintenance.
You can discover many saltwater fish for sale in our fish pet store that can be great for either beginner aquarists or long-time fish pet parents. To make sure you’re adding an appropriate mix of fish into your community, check out our saltwater aquatic life compatibility chart.
Discover freshwater fish for sale at Petco for the right pet fish for your freshwater aquarium—including Petco betta fish.
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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
Check water chemistry first. Use a home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence ( 0 ppm) of ammonia and nitrites with nitrates at 20 ppm or less. Perform partial water changes, no more than 30% at a time, to stabilize chemistry and/or to improve water quality. Use only conditioned water that is temperature matched to prevent stress or shock. Check water temp as well. Any of these can drive a fish to the surface. The "flashing" (darting about) can be due to infection (bacterial, fungal or parasites). Consider a broad spectrum antibiotic or an "all in one" product to treat multiple infections. Look in the Aquarium section of the local Petco for options. Follow label directions carefully and remove the carbon filter insert during treatment if indicated.
Updated on August 12th, 2025
These are the two highest rated foods for your Betta! You can pick some up when your go in to purchase your Betta; Freeze dried bloodworms https://m.petco.com/shop/en/petcostore/product/omega-one-freeze-dried-betta-treat# Aqueon Natural Beta Food https://m.petco.com/shop/en/petcostore/product/aqueon-betta-color-enhancing-pellets-betta-food#
Updated on August 12th, 2025
Check the water temperature. Bettas are tropical fish and do best between 78 F and 80 F. Cold water can affect activity and appetite. Since you recently performed a complete water change, check water chemistry again. Use a home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence (0 ppm) of ammonia AND nitrites with nitrates at 20 ppm or less. Perform a partial water change, no more than 30%, to stabilize chemistry and/or to improve water quality. Use only conditioned water that is temperature matched to prevent further stress or shock. Consider using plain aquarium salt (NOT table or Epsom salt) as a general tonic to reduce stress, increase gill function, treat minor infection and aid in recovery. Dissolve 1 teaspoon of salt per gallon of water in a cup or two of tank water and gently pour it into the tank.
Updated on August 12th, 2025
Hi there! Thanks for using Boop by Petco! This is the same question I asked myself a few years ago when I started with my first saltwater aquarium. It really depends on a lot of factors. Consider that it requires a significant amount of time and money commitment if you want to do it the right way. It is really time consuming though extremely rewarding. Water quality and equilibrium of the tank are key and ensuring both requires using the right equipment and constantly testing the water and adjusting things as needed. I would consider reading a lot about it before commiting any money to it. I personally love it but it really is a second job I have every Saturday morning just to take care of my tank. Good luck!
Updated on August 12th, 2025