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Owned and operated by fellow fish enthusiasts, Seachem has been providing hobbyists with education and support as well as trusted, scientifically proven saltwater and freshwater aquarium products for more than 40 years.
From Seachem Prime, the brand’s flagship water conditioner, to Seachem Stability, which helps prevent the number one cause of fish death, "new tank syndrome"—every product is backed by Seachem’s own staff of experienced chemists and biologists.
Petco proudly carries an extensive line of Seachem products, which are trusted by aquarists around the world to meet the needs of freshwater and saltwater aquariums, as well as reefs and ponds. Shop our wide selection of buffers, conditioners, filtration media, testing kits and more, many of which are completely unique and specific to Seachem:
Seachem Matrix is a unique, high-porosity biomedia for wet or wet/dry filters that have proven to be more effective than plastic biomaterials and will not break down or need to be replaced.
Seachem Purigen is a macro-porous synthetic polymer for freshwater and saltwater with the highest organic removal capacity among competing brands. Purigen darkens as it exhausts and can be easily renewed by treating it with bleach.
Developed for natural freshwater aquariums, Seachem Flourish contains a rich assortment of microelements, trace elements and other nutrients important to the health of aquatic plants.
Seachem products don’t just keep your aquarium healthy, they’re also designed to save you money through increased efficiency and concentration. Shop Petco’s Seachem solutions to find the best one for your aquarium today.
Learn how to safely handle your aquatic life to avoid toxin & bacterial exposure. Find aquatic life care supplies at your neighborhood Petco pet care center.
Updated on October 29th, 2025
Learn how to test your aquarium water. Poor water quality stresses fish, which leaves them susceptible to disease and possibly death.
Updated on October 29th, 2025
Tanks with live plants can be excellent additions to your home, bringing a touch of nature indoors. Learn how to take care of aquatic plants.
Updated on October 29th, 2025
Learn how to care for semi-aggressive fish, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on October 29th, 2025

What is activated carbon and should you add it to your aquarium filter? Learn about activated carbon's uses, maintenance, and how to add it to your filter.
Updated on October 29th, 2025
Reptile water conditioner usually contains chemicals such as Water, Dechloraminating Agents, Synthetic Organic Polymers (Colloids), Chelating Agents, Electrolytes. The reptile conditioner usually also has a chemical that binds calcium in the water as well as a slime protecting agent that is good for amphibians and fish. Aquarium water conditioners (for fresh water fish) contains chemicals such as sulfates such as sodium thiosulfate. Thiosulfate is a Redox reducing agent. Either should be ok for reptiles or fish, however I would stick with reptile conditioner for reptile tanks or mixed (reptile and fish) tanks and for aquaria with fish only I would use specific aquarium water conditioner. The main reason to use a water conditioner is to remove chlorine in water. This, however, can also be attained by leaving the aquarium water fresh from the tap sitting over night. The chlorine will dissipate.
Updated on August 12th, 2025
Some iron is necessary for a healthy aquarium, but too much can promote algae growth or impart an unsightly yellow or orange tinge to the water. Reverse osmosis (RO) filters are deal for removing mineral and heavy metals from water but they can be prohibitively expensive. Buying RO water from a local market or pet store is also a possibility but not economically feasible if you have a large tank. The best option may be a Polyfilter, which can be purchased in the local pet store or online. These filters will remove iron or other metals/chemicals and must be changed monthly or quarterly. You can also buy a water conditioner that will precipitate out some of the iron which can then be removed by mechanical filtration. An example of just one is Rid Metals (by Kordon). Follow label directions carefully, perform regular water changes and monitor iron levels with a home test kit or by submitting a water sample for testing.
Updated on August 12th, 2025
Yes, tap water may contain chlorine or chloramine. Either can be toxic. Chlorine will dissipate if water is left out for 24-48 hours. This is called aging. Chloramines (used by many municipal water systems) will not dissipate and must be removed chemically with a water conditioner. StressCoat by API or NovAqua Plus by Kordon are both adequate conditioners. Look in the aquarium section of the local Petco or fish store for them.
Updated on August 12th, 2025
You shouldn't need anti ich medication for your sliders. The water conditioner (anti chlorine) is always a good idea if you use water from a municipal source. My personal preference for water conditioners are AmQuel Plus, NovAqua and StressCoat. You can purchase them online or in the local pet store. Be sure the water is no deeper than twice the length of the shell. You can read more about slider care here: http://www.anapsid.org/reslider.html
Updated on August 12th, 2025
Without anything to use for scale, it is hard for me to tell how big your tank is, but in general it seems very small. Also, the water that is in the tank appears very cloudy right now, so that would be the first place to start. Water quality is very important, and will make or break your ability to house and care for fish. I would recommend getting a good filter system (you can visit a local pet store to assist you with brands in your area, as I am not familiar with what you can get in India). Be sure to bring the measurements (height, length, width) of your tank, or the gallons or liters so they can tell you what capacity of filter you will need. Everything else will depend on what types of fish you get - if you plan on getting multiple fish, they will need to be small - a general rule of thumb is one square inch of fish per gallon of water. Depending on the species you get, you may need to also get a bubbler to ensure there is enough oxygen in the water for them, and you will also
Updated on August 12th, 2025