10 Best Filter For Small Fish Tank

Updated on: June 2021

Best Filter For Small Fish Tank in 2021


Tetra Aquarium Filter (AQ-78056),Up to 4-Gallons

Tetra Aquarium Filter (AQ-78056),Up to 4-Gallons
BESTSELLER NO. 1 in 2021

Aqueon Quietflow E Internal Power Filter, 3 Gallon

Aqueon Quietflow E Internal Power Filter, 3 Gallon
BESTSELLER NO. 2 in 2021
  • Efficiently cleans and filters water
  • Auto-start pump requires no priming, automatically restarts if power is interrupted and restored
  • Easy to install using suction cups and/or hanging clips*
  • Filters come equipped with:
  • Carbon Cartridge for chemical filtration - removes odors and discoloration from water

Penn Plax Cascade 20 Power Filter – Mini Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups

Penn Plax Cascade 20 Power Filter – Mini Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups
BESTSELLER NO. 3 in 2021
  • QUIET & EFFICIENT: The Cascade 20 Mini Power Hang-On Filter quietly delivers crystal clear water throughout the aquarium. This filter pushes water at 20 Gallons per Hour (GPH) for tanks up to 7 Gallons in size. It’s great for Freshwater and Saltwater aquariums.
  • ACCOMMODATING: The adjustable flow knob allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. The hang-on design is constructed for safe mounting. With a provided extension piece, the lift tube measures between 5” (min) and 6 1/2” (max).
  • EXTREMELY BENEFICIAL: This Cascade filter utilizes disposable, double-sided media cartridges that contain Activated Carbon and Poly Fiber Floss. The included cartridge traps floating particulate matter, removes harmful chemicals and toxins, clears up discolorations, and reduces foul odors from your aquarium’s water.
  • OVERALL MEASUREMENTS: 4. 5” (H) x 3. 75” (W) x 3” (D)
  • SHOP PENN-PLAX FOR ALL YOUR PET’S NEEDS: Penn-Plax is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.

Tetra Whisper Filter Cartridges 4 Count, Extra Small, For aquarium Filtration (AQ-78052)

Tetra Whisper Filter Cartridges 4 Count, Extra Small, For aquarium Filtration (AQ-78052)
BESTSELLER NO. 4 in 2021
  • REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear – removes odors and discoloration
  • CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
  • CONVENIENT Replacement filter cartridges are fully assembled and ready to use
  • USAGE Change every 2 weeks or sooner if there is reduced water flow
  • Age Range Description: All Life Stages

Hygger Quiet Mini Air Pump for Aquarium 1.5 Watt Oxygen Fish Air Pump for 1-15 Gallon Fish Tank with Accessories Black

Hygger Quiet Mini Air Pump for Aquarium 1.5 Watt Oxygen Fish Air Pump for 1-15 Gallon Fish Tank with Accessories Black
BESTSELLER NO. 5 in 2021
  • ▣ This Ultra Quiet HG-811 Aquarium Air Pump is a perfect tool to improve the health and wellbeing of your fish by dissolving oxygen
  • ▣ Unlike traditional air pump, Our mini air pump is driven by a thin piezoelectric ceramic plate, no motor or other mechandism that reduces noise, it is very quiet for fish tank to be placed at bedroom, living room and office
  • ▣ Compact design, measures only 2.4 inches diameter, it is super compact, lightweight, ultra quiet, along with long service life
  • ▣ Only 1.5-watt power consumption is very energy saving with flow rate 420 ml/min, it is a great air pump for small fish tanks range from 1-15 gallons and hydroponic system
  • ▣ Comes with all air pump accessories you need: HG-811 Air pump with power adapter, 3.6 ft long air tube, 0.9 inch air stone, double-sided sucker and user manual

Marina 13315 Top Filter Cartridge

Marina 13315 Top Filter Cartridge
BESTSELLER NO. 6 in 2021
  • For use with all Marina 3.7 L (1 US gal) Aquarium, including Marina pirate Aquarium kit (13310) and Marina mermaid Aquarium kit (13311).
  • Improves water clarity and Color.
  • Removes pollutants and odors.
  • Country of Origin: CHINA

Tetra Whisper Filter Cartridges 6 Count, Small, For aquarium Filtration (19550)

Tetra Whisper Filter Cartridges 6 Count, Small, For aquarium Filtration (19550)
BESTSELLER NO. 7 in 2021
  • REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear – removes odors and discoloration
  • CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
  • CLEAN WATER MADE SIMPLE Small size fits Tetra Whisper 3i Internal Filters
  • CONVENIENT Replacement filter cartridges are fully assembled and ready to use
  • USAGE Change monthly or sooner if there is reduced water flow
  • Age Range Description: Adolescent

Hygger Super Mini Aquarium Single Sponge Filter, Comes with 1 Spare Sponges, Quiet Submersible Foam Filter for Small Fish Tank 0.5-5 Gallon

Hygger Super Mini Aquarium Single Sponge Filter, Comes with 1 Spare Sponges, Quiet Submersible Foam Filter for Small Fish Tank 0.5-5 Gallon
BESTSELLER NO. 8 in 2021
  • 🐠【Multi-filtration functions】this mini sponge aquarium filter combines bio-filtration, oxygenation and physical filtration in one and also makes small water flow, which can ensure the excellence of the water quality. Helps your small fish or shrimp to live a happy, healthy life
  • 🐠【Super Mini Filter Demension 】this single sponge filter is super mini size, takes up a little room, perfect for use in 0.5-5 gallon fish tank bowls. This mini sponge filter is 3.5" in width and 3" in height, the sponge inside circle diameter is 0.59 inch
  • 🐠【Package Includes】1 single mini sponge filter + 1 spare sponge+ 1 suction cup are included in a pack. This aquarium filter must be used with an mini air pupm and a standard size 4mm air hose, please note pump and air hose, media balls are not included. Please choose an air pump according to your fish tank size for this filter
  • 🐠【Removable Fine Sponges 】you can easy to take down the sponge from the filter to clean or replace it, the sponge is fine not coarse, which means more surface area for beneficial bacteri to live on. Don't use tap water to clean it, just rinse or squeeze the sponges by using the aquarium water
  • 🐠【Easy to use】all the parts of this filter are detachable, you can easily to assemble them together, with 1 strong suction cup you can stick the filter firmly to any tank position under water, withouting floating.

SunGrow Neon Tetra Underwater Corner Aquarium Filter, Works for Tropical Fish & Breeder Aquarium, Perfect for Fry & Small Fish & Must-Have for Aquarium Hobbyist, Airline Tube Not Included, 1 Pack

SunGrow Neon Tetra Underwater Corner Aquarium Filter, Works for Tropical Fish & Breeder Aquarium, Perfect for Fry & Small Fish & Must-Have for Aquarium Hobbyist, Airline Tube Not Included, 1 Pack
BESTSELLER NO. 9 in 2021
  • ✔ REPLACE THE TRADITIONAL HOB, CANISTER FILTERS --- Gone are the days when you got to change the cartridges and filter media almost every week. The handy filter by SunGrow will do the same job economically and quickly. This is the easiest filtration method you’ll ever use.
  • SPECIALLY DESIGNED FOR NEON TETRA, FRY & OTHER SMALL AQUATIC PETS --- Neon Tetra, fry and other small fish will NEVER get stuck up into the filter. These fish, especially Betta, generally don’t like vigorous currents, they prefer calm and steady water. This filter is designed to have slow current to easily let betta, goldfish discus, dwarf cichlids, guppies, and krill fish, continue breeding and spawning comfortably.
  • PROVIDE SUPPLEMENTAL FOOD FOR FRY --- The minor bubbles that are created by this sponge filter creates a nominal current, adding in bubbling water. Consequently, it adds to oxygen levels which is beneficial for fish. This will encourage them to continue breeding and spawning comfortably. Also, the sponge filter make home for fish food supplementing their daily dose of diet or food intake.
  • PERFECT FOR UP TO 10.5 GALLON TANK WHEN USED SINGLY --- It only requires an air pump and airline tubing (sold separately) to work. These create numerous minute bubbles for increased oxygen flow. Simply connect an air pump to the top-center of the filter, then place it in your tank. Please note, the base of this noiseless filter is not weighted, so you may need to weigh it down. It is suitable for tanks up to size 10.5 gallons. Use 2 or more filters in larger tanks.
  • EASY TO WASH & REUSE --- This low cost sponge filter can be used multiple times. Instead of tap water, use water from the tank to clean it, during water change. Simply rinse and squeeze a few times, until you see the water run clear from the sponge.

Tetra Whisper Bio-Bag Disposable Filter Cartridges 12 Count, For aquariums, Large, Unassembled

Tetra Whisper Bio-Bag Disposable Filter Cartridges 12 Count, For aquariums, Large, Unassembled
BESTSELLER NO. 10 in 2021
  • UNASSEMBLED REPLACEMENT CARBON FILTER Keeps aquarium water crystal clear – removes odors and discoloration
  • CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
  • FITS TETRA WHISPER WATER FILTERS Color coded to make it simple to remember which replacement cartridge size to purchase
  • CONVENIENT Easy to assemble and easy to replace
  • USAGE Change monthly or sooner if needed

Betta Fish Tank Water

Chances are you got your betta fish at a pet store of somekind. If you had the typical experience, you got a person that told you nothing about the water requirements for your betta or anything else about betta fish care.

You may be inclined to think that any water will do. Most clean water looks, smells and tastes the same, unless it came out of a toilet bowl or something like that, right? Seriously though, different sources of water produce water that has many different characteristics. There are many invisible, and hard to distinguish factors that can have a bad effect on your betta. These invisible things could actually kill your betta.

Here are a couple of water parameters that you should keep in mind when taking care of your betta:

Water pH.

Without getting into a chemistry conversation, pH is a measure of the acidity of the water. If you think about what acid does, you'll understand the importance of keeping an eye on this measure. The range goes from 0-14 and the lower the number, the higher the acidity. A pH of 7 is a neutral reading, meaning that the water is neither acidic nor basic.

The thing with the pH level of water, is that it's tied closely to the source of the water.

Typically speaking, if your water comes from an underground source and has been seeped through lots of different rocks, it probably has a lot of dissolved minerals in it. Water with a lot of minerals dissolved in it is called "hard water". Water from lakes or ponds, where maybe there was a lot of decaying materials etc. usually has more acidity to it but is called "soft water." In some places, the rain water collects so many chemicals as it makes its way through the atmosphere that by the time it reaches the ground it's called "acid rain."

Lots of mineral in suspension = hard water = high pH. The opposite is also true, less minerals = soft water = low pH.

The only way to tell if your water has high or low pH is to measure it with a pH test kit. The test kits are cheap, but you must have one in order to test the acidity of the water. Most water in the US will test between 6-8, but hardly any water will test at the magical 7 without being treated.

Most tropical fish, such as bettas need water that has a neutral pH, meaning the water should test at a 7. To adjust the pH of the water, you need to add "pH up" or "pH down" depending on the case to the water, until it tests at a 7.

VERY IMPORTANT

Any adjustments to the pH must be done gradually. Bettas, like most fish, are very sensitive to sudden fluctuations in their water environment. Only add a few drops at a time of either solution to keep the change as gradual as possible.

Water Temperature

Fish are very sensitive to the temperature of their water.

Tropical fish like water temperatures between 75F and 82F. You may need to get a heater to keep the water within that temperature range, specially if you have a large tank. When it comes to water heaters for your fish tank, you really do get what you pay for, so get the best quality heater that you can afford. You do not need a heater if your tank is smaller than 5 gallons since you may end up cooking your fish.

Regardless of the size of your tank water temperature, is something that you can't see, so you'll need to have a thermometer for your tank. Just use one of those that stick to the side of the tank and you should be fine.

If you'd like to learn more about what kind of water to use and learn more tips about betta fish care, click here to continue.

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