Dennerle Aquarium Kits & Ensembles

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Related Articles & Questions

Home & Habitat
Fish Aquarium Lamps: The Complete Lighting Guide
We can help you navigate your way through all the types of lights in fish tanks and determine which type is best for your aquarium.
Updated on June 19th, 2026
Home & Habitat
Blackwater Aquarium: Setup, Fish & Care Guide
Search Petco to learn about blackwater fish aquariums. We want to help you decide what lifestyle is best for your unique fish.
Updated on June 19th, 2026
Home & Habitat
Marine Aquarium Clean Up Crew: Complete Guide
Visit Petco to learn about cleanup crews and how they can help your aquarium health.
Updated on June 19th, 2026
Care Sheets
Your FOWLR Marine Tank: Easy Setup Guide for Live Rock Fish
Learn how to care for Marine FOWLR Aquariums. These tanks have easier upkeep and require less testing and supplementation than a reef tank. You can keep many fish who would generally consume corals and invertebrates, making it a popular setup choice for more aggressive fish.
Updated on October 23rd, 2025
Home & Habitat
Building a Backyard Pond for Koi & Pond Fish | Petco
When creating an outdoor fish pond you need the right environment, fish and maintenance to keep your water feature looking its best.
Updated on June 19th, 2026
Training & Behavior
My fish are too big for my tanks. What size aquarium do I need?
All these fish can grow quite large. The loach would be the "smallest" at about 6 to 8 inches when full grown. The Oscars can reach lengths of 18 inches and the Texas cichlid and sharks can reach a foot in length. All these fish will require much larger tanks than the ones you have now. The three Oscars alone would do best in a 125 gallon aquarium MINIMUM. The others may thrive in 55 to 75 gallon tanks. To leave them in small tanks will cause stress, aggression and likely infection.
Updated on September 24th, 2025
Vet Q & A
How to prevent algae & ammonia in planted aquarium for a month?
You can buy an automatic feeder which you should set to about 3/4 of the normal feeding amount. There are fish that eat algae, you may want to put in an algae eating fish. If you have a working set up (reliable heat, filter and oxygenation) then you should not have to worry about ammonia. Change 1/3 of the water before you leave, check the filter, remove all mulch from the gravel, and the aquarium should be fine.
Updated on September 24th, 2025
Health & Wellness
How to treat dirty tap water with iron for a healthy aquarium?
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 September 24th, 2025
Vet Q & A
What's the real difference between reptile and fish tank water conditioner?
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 September 24th, 2025
Vet Q & A
How to fix a cloudy fish tank when chemicals aren't working?
Thanks for reaching out. You need to determine why it is cloudy before you can treat. Test for pH, ammonia, nitrites and nitrates. Exam the filters and clean if necessary. Some fish stores will let you bring in water samples to test. Good luck.
Updated on September 24th, 2025