Checklist · 10 picks · 5 categories
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Fish keepers always need something for the tank, whether it's water treatment, a better heater or room for more fish.
For water care, API Stress Coat is BestReviews' best bang for the buck water conditioner, and Seachem Prime, its best of the best, detoxifies heavy metals in tap water without changing pH. For heaters, the Tetra Submersible holds a constant 78 degrees in small tanks, the Eheim Jager has a temperature dial and shuts off when dry, and the Fluval is BestReviews' best of the best. For filters, the Hygger sponge filter is a gentle backup for a small tank, and the AquaClear uses three methods of filtration. For a second tank, the Koller AquaView fits a couple of fish on a desk, and the Aqueon 10-gallon kit includes a heater and conditioner. The splurge is the Tetra ColorFusion 20-gallon kit. Every pick is on my aquarium starter list with its source.
Who this is not for. Skip this if their pet has fur; the gifts for cat lovers and gifts for dog lovers pages cover those.
Best water conditionermid pick · Bottle
Best for fresh or saltwater tanks
BestReviews' best of the best water conditioner: detoxifies heavy metals in tap water without changing pH.
Heads up. A few bottles arrived with a broken seal or no lid, per BestReviews
1 outlet. BestReviews best of the Best water conditioner.
$15-25
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budget pick · Bottle
Best for every water change on a budget
BestReviews' best bang for the buck water conditioner: add it to tap water to protect your tank and its fish.
Heads up. The aloe vera may lead to some slime in the filter
1 outlet. BestReviews best Bang for the Buck water conditioner.
under $15
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| Pick | Tier | Price | Best for | Evidence |
|---|---|---|---|---|
| Fluval Submersible Aquarium Heater | mid | $25-50 | a heater they set once and forget | 1 outlet |
| Tetra Submersible Heater | budget | $15-25 | small tanks up to 10 gallons | 1 outlet |
| Eheim Jager Aquarium Thermostat Heater | mid | $25-50 | picking their own water temperature | 1 outlet |
Best aquarium heatermid pick · 50-200 W
Best for a heater they set once and forget
BestReviews' best of the best aquarium heater: especially durable and shock-resistant, with an adjustable dial.
Heads up. Not completely submersible
1 outlet. BestReviews best of the Best aquarium heater.
$25-50
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budget pick · 2-10 gal tanks
Best for small tanks up to 10 gallons
BestReviews' top pick for small spaces: it reliably keeps water at a constant 78 degrees, good for most tropical fish.
Heads up. Only one preset temperature
1 outlet. BestReviews best for Small Spaces aquarium heater.
$15-25
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mid pick · 25-300 W
Best for picking their own water temperature
BestReviews' best bang for the buck aquarium heater: simple to install, with a selectable temperature dial and auto shut-off when dry.
Heads up. Must be calibrated for best results
1 outlet. BestReviews best Bang for the Buck aquarium heater.
$25-50
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Best aquarium filterbudget pick · 10-40 gal tanks
Best for a gentle backup filter for a small tank
BestReviews' simple yet solid top pick: removable sponges and ceramic balls, with suction cups to hold it in place.
Heads up. BestReviews flags murky water as a possible issue
1 outlet. BestReviews top Pick aquarium filter.
$15-25
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mid pick · Several sizes
Best for upgrading the filter that came with their kit
BestReviews' best of the best aquarium filter: three methods of filtration, and it keeps water flowing even with dirty filters.
Heads up. BestReviews notes some longevity problems
1 outlet. BestReviews best of the Best aquarium filter.
$25-50
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Best aquarium kitbudget pick · 6.5 gal
Best for a couple of small fish on a desk or dresser
BestReviews' best bang for the buck fish tank starter kit: a 6.5-gallon size that can handle a couple of fish, with a quiet filter and color-changing LEDs.
Heads up. It can crack if you move it while it's full, and gravel and plants aren't included
1 outlet. BestReviews best Bang for the Buck fish tank starter kit.
$50-100
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mid pick · 10 gal
Best for tropical fish with everything in one box
BestReviews' feature-packed top pick among 10-gallon tanks: it comes with an LED hood, a power filter with a change alert, a heater and water conditioner.
Heads up. The lights tend not to last long
1 outlet. BestReviews top Pick 10-gallon fish tank.
$50-100
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Best aquarium kitsplurge pick · 20 gal
Best for going bigger with a roomy 20 gallons
BestReviews' best of the best fish tank starter kit: comes with everything you need to give your fish a spacious, comfortable home.
Heads up. BestReviews notes the tank walls can feel flimsy
1 outlet. BestReviews best of the Best fish tank starter kit.
$150-200
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means three independent outlets recommend a pick, means one, and limited evidence means none has yet. I research these picks. I have not tested them myself. How I pick · Broken link, wrong price range or an outdated pick? Tell me
Something the tank always needs, like water conditioner, a heater or a better filter. Seachem Prime is BestReviews' best of the best water conditioner, and the AquaClear Power Filter is its best of the best filter, with three methods of filtration.
It is if they've said they want a second tank. The Koller AquaView 6.5-gallon is BestReviews' best bang for the buck starter kit, and the Tetra ColorFusion 20-gallon, its best of the best, comes with a heater, pump, food, conditioner and net.
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