5 Best Goldfish Tanks in 2021: Reviews & Top Picks

veiltail goldfish
A very helpful buyers guide to help you find the best goldfish tank, we have narrowed it down to these particular 5. Here is why and what you need for a happy and healthy goldfish.

Goldfish are some pretty common and basic fish, although they definitely look cool, and they aren’t too hard to take care of. However, a common misconception is that goldfish can live in a small bowl, which is definitely not true.

Your average goldfish actually needs quite a bit of space to be happy and healthy, and this means having a good size tank. This is what we are here to help with today, to help you find the best goldfish tanks and we have narrowed it down to 5 options.

Tank Sizes Price Our rating
SeaClear Acrylic Set 15 – 50 gallons Check price and more info at Amazon 9.2 / 10
Fluval Bow Kit 45 gallon Check price and more info at Amazon 8.8 / 10
Aqua Culture Kit 29 gallon Check price and more info at Amazon 8.5 / 10

What is the Best Size Tank for Goldfish?

tank size reminder

For common goldfish or single tail goldfish, each fish should have between 30 and 40 gallons of water, with fancy goldfish being able to do fine in 20 gallon tanks.

Therefore, what tank size is ideal is going to depend on the specific species of goldfish which you have. However, generally speaking, the bigger the better.

For common goldfish, a 40 gallon tank is fine, and you’ll want to add around 10 gallons of tank size per extra fish, with the same being true for other types of goldfish too.

5 Best Goldfish Tanks: Reviews

Here are what we consider to be some of the best options currently. Of course, they technically are not just goldfish tanks, as they can be used for all sorts of fish.

1. SeaClear Acrylic Aquarium Combo Set

Size & Shape

This is one of the very best options for your goldfish, and one of the reasons is because in so many different sizes. You can get this particular tank in a 15, 20, 26, 29, 30, 40, 46, and 50 gallon size.

Also, it comes in a variety of shapes too. This includes rectangular, bowfront, hexagonal, rectangular show, and deluxe hexagon.


The SeaClear Acrylic Aquarium is of course made with acrylic, which is fine with us because acrylic is lightweight, tough, and chip resistant.

It’s much more resistant to impact, breaking, and chipping than glass. What’s also pretty nice is that this model is safe for both freshwater and saltwater use.


The SeaClear Acrylic Aquarium Combo Set comes complete with a 24 inch light fixture (30 gallon tank), as well as a light reflector too.

That said, there is no filtration unit or air pump included. Keep in mind that the light fixture does not come with the light bulb.


  • Very durable.
  • Lightweight.
  • Many sizes and shapes.
  • Comes with a reflector and light fixture.
  • Good for freshwater and saltwater use.


  • No light bulb or filter.
  • SeaClear does not actually honor their lifetime guarantee.

Check the current price at Amazon

2. Fluval Premium Bow Front Aquarium Kit

Size & Shape

The Fluval Premium Bow Front Aquarium Kit, as the name implies, is a rectangular bow front aquarium, which means that the front is bowed outwards to create a bit of a magnification effect.

This is a 45 gallon tank with dimensions of 91 x 40.5 x 51 cm (36 x 16 x 20 in).


The material used in the construction of this particular aquarium is glass. Now, glass is of course not overly impact resistant, and yes it is very heavy.

However, the good thing about glass aquariums is that they don’t scratch as easily as their acrylic counterparts, plus let’s face it, glass just looks better too.

Now, that said, the Fluval Premium Bow Front Aquarium can only be used for freshwater applications, not for saltwater.


What is really nice about this particular aquarium kit is that it does come with a lot of extras, more or less everything you need to get started. So, what comes included with this kit?

  • Here you get a low profile canopy LED light with 1470 lumens, which is fixed right into the canopy.
  • There is a Fluval C4 power filter included here, which is more than large and powerful enough to handle 40 gallons of water per hour. It features industry leading 5 stage filtration complete with all 3 major types of filtration (mechanical, biological, chemical).
  • The other thing included here is a European made adjustable and submersible heater, one which is shatter resistant and shock proof.


  • Comes with everything you need (light, filter, heater).
  • Good size for a few fish.
  • Good looking glass + scratch resistant.
  • Bowed front for a cool view.
  • High quality components.
  • Great value.


  • Only comes in a single size.
  • Glass is heavy and susceptible to impact damage.
  • Freshwater only.

Check the current price at Amazon

3. Aqua Culture Aquarium Starter Kit

Size & Shape

Here we have a nice little 29 gallon tank, which should be fine for most applications including goldfish.

No, it’s not a huge tank, built then again, this means that you don’t have to clear too much space for it.

This tank has dimensions of 30 ¼” in length x 12 ½” wide x 18 ¾” tall. Unfortunately, it only comes in a 29 gallon size. Do keep in mind that this is a simple rectangular aquarium.


The Aqua Culture Aquarium is made out of glass, not acrylic. Once again, glass is not overly resistant to impact, and yeah, it’s quite heavy.

Although, with that being said, glass aquariums do of course look super nice, they look elegant, and the high quality glass used here is very hard to scratch. All in all, it is quite the durable little aquarium.

As far as we can tell, this tank is intended for freshwater use. Now, the tank itself could be used for saltwater applications, but the included accessories cannot.


The Aqua Culture Aquarium Starter Kit does come with a number of extras to help get you started.

Now, the accessories included here are not really top of the line, but they do make for a good start. So, what else is included here?

  • Included is a small hood complete with a light, nothing special but it gets the job done.
  • There is also a decent filtration unit included, one that can handle 40 gallon aquariums with ease. It’s not super high quality, but it works well enough.
  • Here you also get a little bit of fish food, a net, and some water conditioner too.


  • Comes with lots of accessories.
  • Good size for a few smaller goldfish.
  • Good looking and scratch resistant glass.
  • A great item for starters.
  • Doesn’t take up too much room.


  • Accessories are not super high quality.
  • Quite heavy for its small size.

Check the current price at Amazon

4. Tetra 20 Gallon Complete Aquarium Kit

Size & Shape

Of course, as the name of the product describes, this is a 20 gallon aquarium with dimensions of 24.2″ L x 12.4″ W x 16.7″ H.

Yes, it is a normal rectangular aquarium. Do keep in mind that this is an all in one kit, not just a single tank, and no, it does not come in any size variations. 20 gallons is it.

We do like how the small tank saves space.


The actual tank is made out of premium Tetra glass. Yes, Tetra manufacturers its own glass for its aquariums, and even better is that they are made in the USA.

This is quite a special type of glass which is super impact, chip, and scratch resistant. It’s probably one of the toughest tanks around.

It’s not super lightweight, but it is high quality. The tank itself could be used for saltwater applications, but the included accessories cannot.


The Tetra 20 Gallon Complete Aquarium Kit, as the name states, is a full kit, and yes, it comes with a few helpful extras to get you started. So, what does this kit include?

  • Included is an LED light good for illumination, quite a high quality one too.
  • There is also a Tetra Whisper 20 gallon filter included. It can’t handle huge amounts of water per hour, but it does engage in all 3 forms of filtration.
  • There is also a small Tetra aquarium heater included here.
  • There are also 4 artificial plants included, as well as a plant mat.


  • Good starter kit.
  • Space saving design.
  • High quality glass.
  • Comes with everything you need .
  • Made in the USA.


  • Filter flow rate is not awesome.
  • Tank is quite heavy.
  • Artificial plants aren’t exactly synonymous with quality.

Check the current price at Amazon

5. Marina LED Aquarium Kit

Size & Shape

What is really cool about this particular kit, is that unlike with all the other kits we have looked at so far today, this one comes in a variety of sizes. Here you can get a 5, 10, or 20 gallon tank, which is pretty cool.

That said, for most goldfish applications, you will want to go with the 20 gallon tank. In terms of the shape, it’s a basic rectangle.


The Marina LED Aquarium is made out of glass. Now, it’s not the highest quality glass around, but durable enough to withstand basic use.

It’s not overly impact resistant, and yeah, it’s fairly heavy, but that said, it also does not scratch easily.

As has been the case with all the other options we have looked at, while the tank itself technically can be used for saltwater applications, the included accessories cannot.


The Marina LED Aquarium Kit comes complete with quite a few extras to help you get started. The following items are included.

  • This kit comes complete with a slim cartridge filter with easy change cartridges. It’s not the best filtration unit around, but good enough for beginners.
  • This kit also comes complete with a canopy and a natural daylight LED lighting system.
  • There is also a fish net, some food, water conditioner, and some bacteria (to start the nitrogen cycle) included as well.


  • Full kit.
  • Various sizes.
  • Space friendly.
  • Decent durably tank.
  • Comes with various extras.


  • Most sizes will be too small for goldfish.
  • Filter is not all that good.

Check the current price at Amazon

What Should I Put in my Goldfish Tank?

Now that you have chosen which tank you want for your goldfish, it is time to choose what goes on the inside of the tank, besides the goldfish of course.

1. Substrate

The first thing you need to put in the tank is some substrate. For goldfish, either very fine gravel or sand is recommended.

Whatever you choose, it needs to be soft and smooth as goldfish do like to root around in substrate, so it needs to be safe.

2. Plants, Wood, & Rocks

The next things you will want to put into the aquarium for your goldfish are some plants. Sure, you can go for artificial plants because they cannot die or be eaten.

However, real plants are always better as they look much better (here are 10 safe options), they can actually grow, they create oxygen, they filter the water, and they can make for good snacks for goldfish too.

A few rocks and pieces of driftwood to bring it all together are recommended as well.

3. Filtration Unit

One of the most important items that every fish tank needs to have is a good filter. First and foremost, the filter in question should be able to process at least 3 times the amount of water in the tank per hour.

This means that a 30 gallon tanks needs a filter that can process at least 90 gallons of water per hour.

Second, you do want to go for a filtration unit that engages ins all 3 major forms of filtration, these being mechanical, biological, and chemical.

For a small goldfish tank, you may want to go for an external filter.

4. An Air Pump & Air Stone

If you have a tank with lots of fish and not so many plants, especially if the water is fairly warm, in order to keep your goldfish breathing, you may want to invest in an air pump and an air stone.

However, in most cases, there should be more than enough dissolved oxygen present in the water.

5. Lighting & A Hood

Every aquarium needs a decent light as well. Now, this doesn’t have to be anything special for goldfish, just something decently durable that can replicate natural daylight.

It’s always nice if the light is built right into a hood or canopy.

6. Heater & Thermometer

Although most goldfish do just fine in cool water, there are a few types which prefer their water to be a bit warmer. If you have one of these types of goldfish, you may need to invest in an aquarium heater.

Regardless of whether or not you need a heater, an aquarium thermometer to keep track of water temperature is always a good idea.

How to set up a Goldfish Tank

Right now want to go over a small step by step tutorial on how to set up a goldfish tank with all of the bells and whistles.

Clean the Tank

Whatever kind of tank you get, make sure to clean it thoroughly first, just to remove all contaminants, dust, debris, and whatever else may be in there.

Adding Substrate

Second, now it is time to put the substrate into the tank. Generally speaking, for an average goldfish tank, 1 to 2 inches of substrate in the bottom of the tank will do just fine.

If you have planted tank with lots of live plants, adding a little extra for good root development is a good idea.

Treating & Adding Water

Now it is time to put the water into the tank. If you are using tap water, make sure to use a water conditioner and a chlorine removal agent to remove all chlorine and other elements present in tap water.

It is a good idea to let the tap water sit for a full day before use. At this point, you will also want to check the pH level of the water, and if necessary adjust the pH level to meet the needs of goldfish.

Now you can slowly pour the water into the tank. Be sure to pour it slowly, so you don’t send the substrate flying around inside the tank.

Plants, Rocks, & Decorations

Now that the water is in the tank, it is time to add the plants, rocks, and other decorations.

Be sure to choose the right plants for goldfish, as goldfish are known to chew on some plants and sometimes uproot them too.

It’s a good idea to get plants that can be tied down. A couple rocks and pieces of driftwood here and there don’t hurt either.

Installing Electronics

At this point it is time to set up the canopy with the light, to set up your filter, the heater, the air pump, air stone, and any other such electrical components which your tank needs.

Be sure to follow all instructions as recommended by the manufacturer for each component.

Cycling the Tank

Perhaps the most important thing to do here, which you cannot forget, is to allow the tank to go through a full nitrogen cycle. For your tank to be safe for fish, there needs to be a lot of beneficial bacteria in the tank which break down ammonia and nitrates.

This means letting the filtration unit run for about 3 weeks for a full cycle to complete, to build up bacteria. There are also special products designed to speed up this process.

Insert Fish

Now it is time. You can add your goldfish to the tank. Be sure to add your fish to the tank according to the proper procedures.

If you have your fish in a bag straight from the shop, put the full bag with water and all into the tank so the fish can adjust to the temperature.


There you have it folks, everything you need to know about setting up your goldfish tank, what needs to be in that tank, and more.

Of course, the main point of today’s exercise was to help you find the best goldfish tank for your needs, and we hope that we were able to do just that!

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