Tetra Aquarium UV Clarifiers

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Product Guides
Activated Carbon for Aquariums: Get Crystal Clear Water & Healthy Fish
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 23rd, 2025
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 October 23rd, 2025
Product Guides
Aquarium Filtration: Pick the Best Filter for a Thriving Tank
Discover the fish tank filter system that’s right for your aquarium. Learn about mechanical, chemical, and biological filtration at Petco.
Updated on October 23rd, 2025
New Pet
Master Aquatic Plant Care: Lush Aquarium Plants & Happy Fish
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 November 6th, 2025
Home & Habitat
Brown Algae in Your Aquarium? Conquer Diatoms & Clear Your Tank Fast!
Do you have questions about brown algae (diatom)? Visit Petco and learn the causes, how to get rid of & how to prevent it.
Updated on October 23rd, 2025
Health & Wellbeing
I have recently used medication in my 50 gal freshwater fish tank with one 22 year old comet goldfish in it . the meds cured my fish but must have killed my beneficial Bacteria as now my established tank has been going through another nitrogen cycle.
Thanks for reaching out about Fishy. A UV sterilizer will only help if a bacterial component is adding to the cloudiness. More intense water changes are the best way to remove nitrates. Monitor feeding to limit excess, vacuum bottom of tank to remove degrading detritus. Good luck.
Updated on September 24th, 2025
Health & Wellbeing
Best Antiparasite, Antibacterial and antifungal medicines for separately or combination for Fish ? And suggest the dose for parrot fish or other fish ?
Pimafix is an acceptable "natural" antifungal treatment. Melafix is for bacterial infections. Kanamycin, erythromycin or metronidazole are good broad spectrum antibiotics. Fungus Cure (by API) is an excellent antifungal. You can find these medications in the aquarium section of most pet stores or even online. Follow label directions carefully and remove the carbon filter insert during treatment if indicated. The cornerstone of any treatment is to first maintain pristine water quality and stable chemistry.
Updated on September 24th, 2025
Health & Wellbeing
I got a lED fish light for my fish tank and I only got one light for one side so far and where the light is its growing a brown algae really bad and the other side without the light isn't. Do certain lights cause algae. If so, what lights don't and w
Its the amount of light that can promote algae overgrowth. Limit lighting to 6-8 hours daily. Monitor water temp as well. Do not overfeed and remove dead/dying plant matter to also limit algae. You can remove any tank furniture and scrub them clean.
Updated on September 24th, 2025
Health & Wellbeing
Concerned about what possible skin diseases?? Some of my fish possibly may have. Is it a possibility that some just algae on them. I recently treated the tank with copper sulfate because I believed that fish may have velvet.. however two days later;
Thanks for reaching out. Have you tested water quality for pH, ammonia, nitrite and nitrate. Correct problems. Don't see any signs of external lesion on the pictures, except fine erosion, and possible gravid fish. A veterinary visit is probably needed to trouble shoot for disease. Randomly adding chemicals to the water could have detrimental effects. Good luck.
Updated on September 24th, 2025
Health & Wellbeing
I have 3 plattys 2 mollys 3 neon tetras and 2 catfish. I feed them worms and flakes once a day ( night time) and do a water change once a month. Is this good?
It depends on how big the tank is as well as the type of filter in use. Smaller tanks and more heavily stocked tanks will require more frequent water changes, about 20% every week or two. Check the chemistry (ammonia, nitrites, nitrates, pH) regularly. This will give you a better idea of when to perform tank maintenance. Tetras and platys are schooling fish and ideally, do better in groups of at least 5 or six.
Updated on September 24th, 2025