Cyriac St.Vil

Aquarium Expert

Cyriac St.Vil is an Aquarium Expert and the Director of Learning Through Nature based in Brooklyn, New York. With over 26 years of experience working with aquariums, Cyriac and the Learning Through Nature team have created aquariums in classrooms, lobbies, and dining halls for viewing and educational purposes. He has extensive knowledge of aquarium maintenance and care, making science fun, and building living habitats.

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Co-authored Articles (8)

How to

Cure Goldfish Ich

Goldfish ich (''Ichthyophthirius multifiliis'') is one of the most common fish parasite found in aquariums. Most aquarium owners will need to deal with goldfish ich at some point, and fast, as leaving ich untreated can k...

How to

Grow Bioluminescent Algae at Home

Bioluminescence, which means "living light," occurs in fireflies, certain fungi and fish, and microorganisms like Dinoflagellates, a species of algae. Dinoflagellates in marine environments can multiply rapidly with th...

How to

Have a Happy Betta Fish

Does your betta fish look sad? Is he often resting at the bottom of his tank? Your fish might be bored or even sick. It is a popular belief that betta fish need little to no care, but this is not true. Here are some way...

How to

Control an Algae Bloom

Some trace levels of algae may be unavoidable in aquatic environments, though at small levels they are not necessarily a bad thing for your aquarium. However, depending on the type of algae and extent of growth, an algal...

How to

Reduce Chlorine in an Aquarium

Chlorine is added to tap water to kill off harmful pathogens, but it’s not something you want in your aquarium. Any trace of chlorine in the tank water can throw off the pH and oxygen levels and make your fish sick—t...

How to

Install an Undergravel Filter (UGF)

Using an undergravel filter (UGF) is a tried and true method of filtering the water in a fish tank or aquarium. Undergravel filters work by pulling water and impurities downward through the gravel at the bottom of the ta...

How to

Treat Fish Diseases

Sometimes fish become victims of disease. Some fish diseases are easy to treat, where others are deadly. Many aquarists have a quarantine tank set up to acclimate new fish in order to quarantine them from the main displa...

How to

Troubleshoot Tank Cycling Problems

Cycling a fish tank is the necessary process of building up the bacteria in your new filter to make the water safe for your new fish. The bacteria will consume the ammonia in fish waste, and turn it into nitrites that ot...