Aquarium field guide

Understand what the water is telling you.

Practical explanations for common aquarium problems, ecosystem fundamentals, aquatic pets, and the craft of building living underwater worlds.

Aquarium Help

What is the nitrogen cycle?

The nitrogen cycle is a biological process that converts harmful substances like ammonia, produced by fish waste and uneaten food, into less harmful…

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Why is my fish not eating?

It is extremely concerning when your fish suddenly stop eating. It may indicate an underlying issue that needs to be addressed. Here are a few of the most…

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Why are my fish's eyes cloudy?

A common problem that fish owners encounter is cloudy eyes in their beloved aquatic pets. Cloudy eyes can be indicative of various underlying issues, and…

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Why is my fish tank green?

If you're an aquarium enthusiast, you've probably encountered this problem before: You wake up one day to find your fish tank has turned a murky shade of…

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Aquarium Help

Stop aquarium leaks fast

Aquarium leaks can go from bad to worse really fast. The faster you can identify the source of the aquarium leak and take action to fix it, can save you…

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