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Freshwater Nano & Fish Care

Discover tips for keeping small freshwater tanks thriving, from fish selection to water quality and daily care essentials.

Best Small Aquarium Fish: Top Picks for 3 to 20 Gallon Tanks

July 10, 2025 by Nanoaquarium
Nano Aquarium

When considering what fish to keep in a small aquarium, it is important to choose species that will thrive in a limited space. I will start with my recommendations for the smallest aquariums, which are typically around 3 gallons, though sizes can range from 2.5 to 3.5 gallons. One of my own tanks, for instance, … Read more

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Chili Rasbora Care: Nano Fish Tank Setup, Feeding & Breeding

July 10, 2025 by Nanoaquarium
Nano Aquarium

When searching for one of the smallest nano fish suitable for a 5-gallon tank, chili rasboras are always recommended. They often appear pale in fish stores, but after bringing them home and providing excellent nutrition for 3 to 6 months, their colors begin to emerge. I have had my chili rasboras for 9 months, and … Read more

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Ultimate Aquarium Algae-Eaters Guide: Top, Worst and Useless

July 10, 2025 by Nanoaquarium
Nano Aquarium

First and foremost, the worst algae eaters are the Chinese Algae Eaters. Why Are Chinese Algae Eaters a Bad Choice? Chinese Algae Eaters, as their name implies, eat algae when they are between 1 and 3 inches in size. After they surpass that size, they become aggressive, compete with other fish, and may even start … Read more

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