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Best Fish for Nano Aquariums: Complete Freshwater and Saltwater Species Guide

Best Fish for Nano Aquariums: Complete Freshwater and Saltwater Species Guide

Abstract Nano aquariums need fish that stay small as adults, produce a light biological load, and match the swimming space of a compact aquarium. A fish is not suitable for a nano tank just because it is small at the store. Adult size, schooling behavior,…

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Blue Tang Aquarium Size and Equipment Guide: What Tank Size Works for Blue Tang

Blue Tang Aquarium Size and Equipment Guide: What Tank Size Works for Blue Tang

From the tang tank of the Ruibit Aquarium factory, Foshan — a 6-foot display where a single blue tang cruises the full length of the glass, which is the only way a blue tang should ever see a tank — a customer wrote to us…

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What Size Aquarium Do You Need for African Cichlids? Complete Equipment Guide

What Size Aquarium Do You Need for African Cichlids? Complete Equipment Guide

Abstract African cichlids should not be sized by water volume alone. The right aquarium depends on species group, adult size, aggression level, tank length, rockwork layout, filtration capacity, and water chemistry. A 200-liter aquarium may sound large, but a short 200-liter tank can be less…

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What Size Aquarium Do You Need for Betta Fish? What Equipment Is Required

What Size Aquarium Do You Need for Betta Fish? What Equipment Is Required

Walk through almost any aquarium shop and you may see a betta displayed in a very small container. That creates an unfortunate impression: If the fish can live in a cup, surely it doesn't need a real aquarium. A betta can survive temporarily in a…

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Clownfish Aquarium Size and Equipment Guide: What Tank Size Works for Clownfish

Clownfish Aquarium Size and Equipment Guide: What Tank Size Works for Clownfish

From the saltwater test room of the Ruibit Aquarium factory, Foshan — where a pair of clownfish has been living in a 20-gallon tank for four years, which surprises every visitor — a customer wrote to us with the most common question in the marine…

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How to Choose Aquarium Size for Koi Fish? Complete List of Essential Equipment

How to Choose Aquarium Size for Koi Fish? Complete List of Essential Equipment

Abstract Koi fish should not be sized like small ornamental aquarium fish. They grow large, produce heavy waste, need strong oxygen, and are usually better suited to a koi pond or a very large custom aquarium than a standard home fish tank. For long-term keeping,…

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Arowana Aquarium Size and Equipment Guide: What Tank Size Works for Arowana

Arowana Aquarium Size and Equipment Guide: What Tank Size Works for Arowana

A customer once showed us a beautiful 150 cm aquarium and asked: “Is this big enough for my arowana? It is only 20 cm now.” For the fish standing in front of us that day, probably. For the same fish several years later, that was…

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Koi Aquarium Size and Equipment Guide: What Tank Size Works for Koi

Koi Aquarium Size and Equipment Guide: What Tank Size Works for Koi

From the display floor of the Ruibit Aquarium factory, Foshan — where we've watched more koi sales end in quiet regret than any other fish — a customer walked in and asked the question that starts most koi disasters. "I want koi in my living…

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Essential Aquarium Gear for Freshwater vs Saltwater Ornamental Fish

Essential Aquarium Gear for Freshwater vs Saltwater Ornamental Fish

Abstract Freshwater and saltwater ornamental fish need different aquarium gear because the systems manage different risks. A freshwater aquarium usually depends on a reliable tank, filter, heater, thermometer, light, substrate, water conditioner, and aquarium test kit. A saltwater aquarium needs those basics plus salt mix,…

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Freshwater and Saltwater Tanks: How Fish Selection Varies Between Them

Freshwater and Saltwater Tanks: How Fish Selection Varies Between Them

From the two test rooms of the Ruibit Aquarium factory, Foshan — freshwater on one side of the wall, saltwater on the other, one meter apart and a world apart — a customer who'd kept freshwater for two years asked the question every freshwater keeper…

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Best Ornamental Fish for Beginners: Top Choices That Are Easy to Keep

Best Ornamental Fish for Beginners: Top Choices That Are Easy to Keep

A beginner once asked us a question while choosing a new aquarium: “Which fish is the hardest to kill?” It sounds practical, but it is the wrong question. No ornamental fish is maintenance-free. Even hardy species can die in an uncycled aquarium, poor water quality…

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Cloudy Aquarium Water: Quick Troubleshooting From These Key Areas

Cloudy Aquarium Water: Quick Troubleshooting From These Key Areas

The fish are swimming normally. The filter is running. Yesterday the aquarium looked clear. This morning, the water looks like someone poured a glass of milk into it. The first reaction is usually to change the water, clean the filter or add a “water clarifier.”…

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Is a Sump Aquarium Difficult to Keep Up With? Essential Daily Care Tips

Is a Sump Aquarium Difficult to Keep Up With? Essential Daily Care Tips

Open the cabinet under a large aquarium and a sump can look intimidating. There is a return pump, filter media, protein skimmer, pipes, valves, sensors and perhaps an automatic top-off system. For a new aquarium owner, it can resemble a small water-treatment plant. But a…

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Common Hidden Risks in Sump Aquariums: How to Avoid Overflow, Low Water Level, and Noise

Common Hidden Risks in Sump Aquariums: How to Avoid Overflow, Low Water Level, and Noise

Abstract The three most common hidden risks in a sump aquarium are overflow, low return-pump water level, and drain noise. They usually happen because the display tank, overflow box, sump water level, return pump, and plumbing are not balanced as one system. A sump filtration…

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The Water Change Is a Painkiller: How to Lower Ammonia and Nitrite Without Making It Worse

The Water Change Is a Painkiller: How to Lower Ammonia and Nitrite Without Making It Worse

From the cycling room of the Ruibit Aquarium factory, Foshan — where new systems spend weeks in quarantine before they're allowed near a fish — a customer called with the same story we hear every month. "The test says ammonia 2 ppm," he said. "I…

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