The thumb rule to follow for neon tetras is for a 1 gallon per 1 inch long tetra fish. So 20 gallons tank typically means 20 tetras. And Yes you can mix the two black and red tetras half and half - with thumb rule being followed..
In respect to this, how many fish can be in a 20 gallon tank?
Basing on the rule "1 inch fish per gallon of water", a tank with 20 gallons of water can accommodate twenty of 1 inch fish.
how many neon tetras can I put in a 29 gallon tank? No problem. The Tetras are schooling fish and the recommending tank size is 10 gallons for every 24 Neons you keep. So, 50 in 29 gallons will give the poster a little "wiggle room".
Also know, what fish can I put in a 20 gallon tank?
Top 10 Fish for a 20-Gallon Aquarium
- Platy.
- Swordtail.
- Molly Fish.
- Cory Catfish.
- Dwarf Gourami.
- Neon Tetra.
- Zebra Danio.
- Fancy Guppy.
What is the biggest fish you can put in a 20 gallon tank?
A Keyhole cichlid should be okay for a the long 20 gallon. You could do Tbar cichlid also. the tank is 20 gallons not 20 inches or centimetres, most often they are 24 inches long and 10-12 inches wide and often 18 inches high.
Related Question Answers
What can I keep in a 20 gallon tank?
Some of the most suitable fish for 20-gallon aquariums include: - Platys.
- Cardinal tetras (Paracheirodon axelrodi)
- Zebra danios (Danio rerio)
- Red-tailed sharks (Epalzeorhynchos bicolor)
- Pygmy sucker catfish (Otocinclus vittatus)
- Bronze corys (Corydoras aeneus)
What is the size of 20 gallon fish tank?
Aquarium Weights & Sizes
| SMALL AQUARIUMS |
| 20 gallon High | 24" x 12" x 16" | 225 lbs |
| 20 gallon Long | 30" x 12" x 12" | 225 lbs |
| 25 gallon | 24" x 12" x 20" | 282 lbs |
| 29 gallon | 30" x 12" x 18" | 330 lbs |
How many goldfish can you put in a 20 gallon tank?
The general rule of thumb for goldfish is actually 20 gallons for the first goldfish and 10 gallons for each additional fish so four goldfish would actually need a 50 gallon tank as opposed to a 40.How many Swordtails are in a 20 gallon tank?
So I recently bought a 20 gallon tank (high) and I have 3 swordtails in it right now.What's the lucky number for fish?
Most feng shui practitioners agree that the number nine is the most auspicious number, so it's no wonder that this is the favored number of fish for your tank or aquarium. The number nine is the number for prosperity, which symbolizes your wealth having a long life span.How long is a 20 gallon long tank?
Aquarium Sizes
| Tank Size | Outside Dimensions in Inches (L x W x H) | Weight Empty and Full (lbs) |
| 25 Gallon | 24 1/4 x 12 1/2 x 20 3/4 | 32 |
| 30 X-High | 24 1/4 x 12 1/2 x 24 3/4 | 41 |
| 20 Long | 30 1/4 x 12 1/2 x 12 3/4 | 25 |
| 29 Gallon | 30 1/4 x 12 1/2 x 18 3/4 | 40 |
How many angelfish can you have in a 20 gallon tank?
I keep 6 angels in a 20-gallon tank.How many female bettas can I keep in a 20 gallon tank?
Would 5 female bettas get along and fit in a 20 gallon aquarium? They would probally be fine. I think that would be enough room as long as it is a long and not a tall tank. Also before you put them in you need to make sure you have LOTS of hiding places among plants and caves just in case there is a problem.How many guppies can you have in a 20 gallon tank?
The rule of thumb a lot of people use is adding 3 guppies to per 10 gallons of fish tank. So if you have a 20 gallon tank, that's a tank size of 20 gallons. Some may disagree but it's a general standard used in the guppy fish groups.How much gravel do I need for a 20 gallon tank?
Based on our previous requirement of 1 pound of gravel per gallon of water, this means that you will need roughly 20 pounds of gravel substrate for a 20 gallon fish tank.Can 2 goldfish live in a 20 gallon tank?
As you can see below you can get 2 common goldfish in a 20 gallon tank. Fancy goldfish require more space so you would fit 2 fancy goldfish in a 30 gallon tank or a 20 gallon tank but we don't recommend that for the long term. Fish love their space and space is one of the foundations to a happy fish.How many Serpae Tetras are in a 20 gallon?
Cycling 20 gallon tank with 8 Serpae Tetras (79 Degrees) - Tropical Fish Keeping - Aquarium fish care and resources.Is 4 neon tetras enough?
Neon tetras should be kept in schools of 4-6 but 10 would be ideal. They are schooling fish that are very active typically swimming horizontally. Use plants and rocks and driftwood to provide entertainment and also provide security for these little guys. Use a good small filter to keep the tank healthy and clean.How many tetras are in a tank?
This rule is simple: 1 linear inch of fish requires 1 gallon of water. However, the rule starts to fall apart with fish longer than 3 inches. Fortunately, many common tetras fit well into this size range. For example, according to this rule, a 10-gallon tank could hold a 10-fish school of 1-inch neon tetras.How many neon tetras should be together?
Yes, in fact Neon Tetras do better when they are kept together. If you're planning to keep a school of them, you should keep at least 15-20 of them. An aquarium that is at least 20 gallons is needed for this number of them. As a general rule the larger the school the more comfortable your Tetras will be.How many neon tetras can I put in a 1 gallon tank?
A 1 gallon tank is to small for neon tetras, you might be able to get away with putting a couple of shrimp in there but I would recommend a 5 gallon tank for neon tetras. If you want neon tetras put them in groups of more than 6.How many neon tetras is 30 gallons?
The general rule of thumb, when stocking any aquarium, is to allow one gallon of water for each inch of fish. Therefore, in a 30 gallon tank you have enough room for 30 inches of fish. For example, you have enough room in your 30 gallon tank if you stock it with 15 two-inch neon tetras.How many neon tetras can I put in a 38 gallon tank?
For a 38 gallons, you can consider 30-40 cardinal tetras.How many neon tetras can I put in a 5 gallon tank?
On the upside, Neon Tetras are a small community fish. They only grow to about 1.5 to 3 inches or so when fully grown. Since tetras are a schooling fish, they prefer to be in a school of other tetras. You would need at least 6 – 10 of them and that's about the maximum you would want to stock your 5-gallon tank with. 
