What Fish Should I Get – ? Your Ultimate Guide To Choosing The Perfect
So, you’ve taken the plunge! Perhaps you’ve just set up your very first aquarium, or maybe you’re an experienced hobbyist looking to add new life to an established tank. The excitement is palpable, but then comes the big question: “what fish should I get?”
It’s a common query, and one that, if answered thoughtfully, leads to a thriving, beautiful aquatic ecosystem. Don’t worry—this comprehensive guide from Aquifarm is here to help you navigate the wonderful world of fish selection.
We’ll walk you through every crucial step, from understanding your tank’s limits to discovering species that will truly thrive under your care. Our goal is to empower you to make informed choices that ensure a happy, healthy home for your future aquatic pets.
Let’s dive in and find the perfect finned friends for your unique setup!
Understanding Your Aquarium’s Foundation: Tank Size & Cycling
Before you even think about specific fish species, you need to understand the environment you’re providing. Your aquarium isn’t just a glass box; it’s a carefully balanced ecosystem.
The size of your tank and its biological maturity are the absolute first things to consider. These two factors dictate almost everything else.
Tank Size Matters: More Than Just Gallons
The most common mistake beginners make is overstocking a small tank. Every fish needs adequate space to swim, hide, and grow to its full adult size.
A good rule of thumb is “one inch of adult fish per gallon” for small, slender species. However, this is a very rough guide and doesn’t apply to larger or wider fish.
For example, a single Betta fish needs at least 5 gallons, while a small school of Neon Tetras would be happier in a 10-gallon tank or larger. Larger fish, like many cichlids or Plecos, require significantly more space.
Always research the adult size of any fish you consider. A tiny fry in the store can quickly become a giant!
The Importance of the Nitrogen Cycle
This is non-negotiable for a healthy aquarium. The nitrogen cycle is the biological process that converts toxic fish waste (ammonia) into less harmful nitrates.
Your tank needs beneficial bacteria to establish this cycle. This process, known as “cycling your tank,” typically takes 4-6 weeks and involves monitoring water parameters.
Adding fish to an uncycled tank exposes them to deadly ammonia and nitrite spikes. It’s cruel and almost guarantees failure.
Trust me, patience here pays off tenfold. A fully cycled tank is a stable, forgiving environment for your new fish.
Compatibility is Key: Choosing Peaceful Tank Mates
Once your tank is cycled and you know its capacity, the next big hurdle is choosing fish that can live together harmoniously. Mixing incompatible species is a recipe for stress, aggression, and even death.
Think of it like a diverse neighborhood: you want residents who get along, not constant feuds!
Temperament: Aggressive, Semi-Aggressive, or Peaceful?
Most hobbyists aim for a “community tank” filled with peaceful species. These fish typically ignore each other, focusing on foraging and swimming.
Examples include most tetras, rasboras, corydoras, and many livebearers. They thrive in groups and rarely cause trouble.
Semi-aggressive fish, like some cichlids or larger barbs, can be housed together with careful planning, often in larger tanks with plenty of hiding spots. They might nip fins or establish territories.
Aggressive fish, such as some predatory cichlids or large Oscars, are best kept in species-only tanks or with other robust, equally aggressive fish in very large setups. Avoid mixing them with peaceful species at all costs.
Size Differences: Predator and Prey
It’s a simple law of nature: if a fish can fit another fish in its mouth, it will eventually try to eat it.
Avoid housing tiny, delicate fish with significantly larger, predatory species. For instance, don’t put small Neon Tetras with an adult Angelfish, as the tetras will likely become snacks.
Choose fish that are roughly the same size, or ensure the larger fish are known to be docile and herbivorous.
Water Parameter Requirements: Temperature, pH, and Hardness
Fish from different parts of the world have evolved in specific water conditions. Matching these parameters is crucial for their health.
For example, Discus fish require warm, soft, acidic water, while African Cichlids prefer hard, alkaline water. Mixing these would stress both types of fish.
Always research the ideal temperature, pH, and hardness for every species you consider. Aim for a group of fish that all thrive in similar conditions.
Top Picks for Beginners: Easy-Care Fish to Start Your Journey
If you’re still wondering “what fish should I get” for a first-time setup, focusing on hardy, adaptable species is a smart move. These fish are more forgiving of minor fluctuations and common beginner mistakes.
They’re a fantastic way to learn the ropes of fish keeping without too much stress.
Livebearers: Guppies, Platies, Mollies, and Swordtails
These vibrant, active fish are incredibly popular for good reason. They’re hardy, come in a dazzling array of colors, and are relatively easy to care for.
They also, as their name suggests, give birth to live fry, which can be exciting (and sometimes overwhelming!) for new aquarists.
Just be mindful that they reproduce quickly. Plan for potential population growth or consider keeping only males.
Tetras: Neon Tetras, Cardinal Tetras, Black Skirt Tetras
Schooling fish are mesmerizing to watch, and tetras are among the best for adding dynamic movement to your tank. They are generally peaceful and thrive in groups of six or more.
Neon Tetras are iconic with their iridescent blue and red stripes, while Cardinal Tetras offer even more intense coloration. Black Skirt Tetras are a bit larger and very hardy.
They prefer planted tanks and stable water conditions.
Corydoras Catfish: The Peaceful Bottom Dwellers
These adorable, armored catfish are essential for any community tank. They are peaceful, social, and spend their time sifting through the substrate for leftover food.
Corydoras should always be kept in groups of at least three, preferably six or more, as they are schooling fish. They need a soft substrate like sand to protect their delicate barbels.
They do a fantastic job of keeping the bottom of your tank clean, but they are not algae eaters; they are omnivores.
Betta Fish: The Solo Star (with a caveat)
The stunning Betta fish (Siamese Fighting Fish) is incredibly popular due to its vibrant colors and flowing fins. They are beautiful, full of personality, and can be kept in tanks as small as 5 gallons.
However, they are highly territorial and aggressive towards other male Bettas, and sometimes even towards similarly finned or brightly colored fish.
They are best kept as a single fish in their own tank, or very carefully in a community tank with specific, docile tank mates that won’t nip their fins.
Beyond the Basics: Exploring Different Fish Personalities and Needs
Once you have a handle on the fundamentals, you might find yourself asking “what fish should I get” that offers a bit more challenge or unique behavior. This is where the hobby truly expands!
Dwarf Cichlids: Ram Cichlids, Apistogrammas
For those looking for fish with more personality and interesting breeding behaviors, dwarf cichlids are a fantastic step up. They are smaller than their larger cichlid cousins and can often be kept in community tanks.
German Blue Rams and Bolivian Rams are stunningly beautiful and relatively peaceful. Apistogrammas are another diverse group, known for their vibrant colors and parental care.
They require stable water parameters, good filtration, and plenty of hiding spots.
Rasboras and Danios: Active Swimmers
These small, active schooling fish are perfect for adding energy to a community tank. Harlequin Rasboras are a classic choice, known for their copper bodies and triangular black mark.
Zebra Danios are incredibly hardy and active, often seen zipping around the top of the tank. They are fantastic for beginners, especially as a “dither fish” to make shyer species feel more secure.
They enjoy planted tanks with open swimming spaces.
Otocinclus Catfish: The Tiny Algae Eaters
If you’re looking for a natural algae solution, the Otocinclus catfish is a tiny, peaceful, and efficient grazer. They are much smaller than Plecos and won’t outgrow most tanks.
Like Corydoras, Otos are schooling fish and should be kept in groups of at least six. They thrive in mature, well-planted tanks with plenty of surface area for algae growth.
Be aware that they can be sensitive to new tank conditions, so introduce them to established aquariums.
What Fish Should I Get? Matching Your Lifestyle to Your Livestock
Your personal lifestyle, available time, and commitment level play a huge role in determining the right fish for you. This isn’t just about tank size; it’s about you.
Time Commitment: Low vs. High Maintenance
Some fish require daily attention, specific feeding regimens, or frequent water changes. Others are more forgiving.
If you have a busy schedule, consider hardy, low-maintenance species like Guppies or Danios. They are more tolerant of less frequent (but still regular!) water changes.
If you’re ready for a more hands-on approach, you might explore fish that need specialized diets, precise water parameters, or intricate breeding setups.
Budget: Initial Setup & Ongoing Costs
Fish keeping can be as inexpensive or as costly as you make it. Consider the initial cost of the tank, filter, heater, substrate, and decorations.
Then, factor in ongoing costs like fish food, water conditioners, test kits, and electricity for heaters and filters. Larger tanks and specialized equipment naturally incur higher costs.
Don’t forget the cost of the fish themselves! Some rare species can be quite expensive.
Aesthetic Preference: Colors, Shapes, Behaviors
Ultimately, you want to enjoy looking at your aquarium. Do you prefer vibrant, flashy colors or subtle, natural tones?
Are you captivated by schooling behavior, or do you prefer to watch a single, majestic fish like a Betta? Do you want active swimmers, or fish that spend their time exploring caves?
Think about what kind of visual experience you’re hoping to create. This will help guide your choices and make your hobby more fulfilling.
Aquarium Setup Checklist: Before You Buy
Before you bring any fish home, ensure your aquarium is truly ready. This checklist will help you avoid common pitfalls and provide the best possible start for your new aquatic friends.
Water Parameters Checklist
- Temperature: Stable and within the ideal range for your chosen species. A reliable heater is crucial.
- pH: Consistent and appropriate for your fish. Test regularly.
- Ammonia: 0 ppm (parts per million).
- Nitrite: 0 ppm.
- Nitrate: Below 20 ppm (ideally lower for sensitive species).
- GH/KH (Hardness): Appropriate for your species.
Filtration & Heating
Ensure you have an adequately sized filter for your tank, providing both mechanical and biological filtration. A good filter is the workhorse of your aquarium.
Your heater should be properly sized for your tank and maintaining a stable temperature. Use a thermometer to verify its accuracy.
Substrate and Decorations
Choose a substrate that is safe for your fish (e.g., sand for Corydoras). Provide plenty of hiding spots with caves, driftwood, and live or artificial plants.
These hiding spots reduce stress and provide territories, making your fish feel more secure.
Quarantine Procedures
This is a critical, often overlooked step. Always quarantine new fish in a separate, smaller tank for 2-4 weeks before introducing them to your main display tank.
This allows you to observe them for signs of disease, treat any potential illnesses, and prevent the spread of pathogens to your healthy, established fish. It’s a lifesaver for your entire tank.
FAQs: Common Questions When Deciding What Fish Should I Get
Here are some quick answers to frequently asked questions about choosing fish.
Can I put a Betta fish in a community tank?
Yes, but with caution. Bettas are typically fine with peaceful, short-finned fish that aren’t overly colorful or nippy. Avoid other male Bettas, Guppies, or any fish known to nip fins.
How many fish can I put in my 10-gallon tank?
For a 10-gallon, you could comfortably house a small school of 6-8 Neon Tetras, 5-6 Guppies (all males to avoid overpopulation), or a single Betta with a few small shrimp or snails. Always consider adult size.
What are some good fish for a beginner?
Guppies, Platies, Neon Tetras, Harlequin Rasboras, and Corydoras Catfish are excellent choices due to their hardiness and peaceful nature.
Do I need to cycle my tank before adding fish?
Absolutely, yes. Cycling is crucial. Adding fish to an uncycled tank will expose them to toxic ammonia and nitrites, leading to illness and likely death. Patience is key!
How often should I feed my fish?
Most adult fish do well with small feedings 1-2 times a day. Only feed what they can consume in 2-3 minutes. Overfeeding pollutes the water and leads to health issues.
Can I mix tropical fish with coldwater fish?
No. Tropical fish require heated water (typically 72-82°F), while coldwater fish like Goldfish thrive in cooler temperatures. Mixing them will stress both types.
Conclusion: Your Journey to a Thriving Aquarium
Deciding “what fish should I get” is one of the most exciting parts of the aquarium hobby, but it’s also one of the most important decisions you’ll make. By taking the time to understand your tank’s capabilities and the specific needs of different fish species, you’re setting yourself up for incredible success.
Remember, fish keeping is a journey of learning and observation. Start with hardy, beginner-friendly species, ensure your tank is properly cycled, and always prioritize compatibility. With a little research and patience, you’ll create a vibrant, healthy aquatic world that brings joy for years to come.
Happy fish keeping from your friends at Aquifarm! We’re here to help you every step of the way.
