Ken Colby

Saltwater Aquarist

Ken Colby is a Saltwater Aquarist and the Owner of High Tide Aquatics based in Oakland, California. With over 30 years of experience, Ken is the only local fish store owner in the United States that is certified by Humble Fish, the marine disease expert forum, as a Quarantined Fish Vendor. Ken creates in-person and online educational programming in partnership with other marine science and biology professionals.

Professional Achievements

Has appeared as a guest on multiple video podcasts including 'Reef Beef' with Richard Ross and Ben Johnson, and 'Humblefish and Friends'
Coral Magazine featured Colby's 'Cocktails & Coral Talk' speaker series events in their January 2023 edition
He launched High Tide Aquatics’ YouTube channel in 2023, sharing recordings of events he’s hosted as well as "how-to" videos covering everything from coral fragging to kalkwasser dosing

Certifications & Organizations

Bay Area Reefers Club, Member, 19 year tenure
Certified by Humble Fish

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Co-authored Articles (9)

How to

Revive a Goldfish

On occasion a goldfish might jump out of his tank and end up out of water. This could be due to water that is too warm for the goldfish (at a temperature higher than 75 degrees F), or a goldfish that is infected with a p...

How to

Take Care of an Aquatic Snail

Aquatic snails need a healthy, stable environment and adequate food in order to survive. Depending on the size and type of snail you choose, you may need additional space and alternate food sources. There are many differ...

How to

Treat Tropical Fish with White Spot Disease (Ich)

White spot disease, also known as Ich, is a parasite that most tropical fish enthusiasts will, at one time or another, have to deal with. White spot disease is responsible for more fish deaths than any other disease. Thi...

How to

Take Care of a Live Clam

Clams are a wonderful, low-maintenance addition to any tank, as they naturally filter out some microorganisms and make beautiful, decorative structures on the bottom of your aquarium. However, just because they are low m...

How to

Prepare Veggies for Your Molly

Molly fish in the wild feast on scraps and floating bits of food in the water, but in an aquarium, they can thrive off of a mix of nutritious fish flakes and veggies. A molly fish diet should be mostly fish flakes, but i...

How to

Hold a Fish

It’s important to know the right way to handle a fish when you take it out of the water, especially if you plan to release it. Holding a fish improperly can traumatize and even injure it, making it less likely to survi...

How to

Take Care of an Apple Snail

Whether you want a new addition to an already thriving freshwater aquarium or you're in search of a new, low-maintenance pet, an apple snail is a great choice. A species of aquatic snail that encompasses the mystery snai...

How to

Protect Coral Reefs

Coral reefs are unique, biologically rich, and complex ecosystems that are sometimes called the "rainforests of the ocean." Pollution, disease, invasive species, and unaware tourists all cause them harm. The decline of c...

How to

Grow Copepods

Copepods are tiny crustaceans. These little critters are important food sources for certain types of marine fish and filter feeders. In fact, they are the only food that some species of fish will eat! Growing your own co...