The use of ozone has long been a standard practice in industrial and public water purification plants, and large scale public aquarium filtration, as one of the best and most efficient means to increase water quality, while still being able to promote water conservation.   One of the biggest problems to overcome in these closed water [...]

Welcome back Patty Little to That Fish Blog!
Clams and other bivalves are well known for their filtering capabilities, absorbing toxins and nutrients from natural waterways both freshwater and saltwater. While clams and their relatives are common to reef aquaria, there are also clams available for freshwater tanks. The clams offered most commonly by pet stores [...]

Please welcome back Desiree Leonard to That Fish Blog.
We as biologists at times take our knowledge for granted and forget that not everyone that is involved in the hobby is fully aware of all of the natural processes and progressions which occur in a saltwater aquarium. 
Frequently we are contacted by frantic new aquarists with [...]

Introduction
A thorough understanding of how water quality affects animal life is essential if one is to be a successful aquarist.  This is sometimes a bit difficult for beginners to accept, but please remember that it is a serious mistake to spend time learning about the habits and dietary needs of aquatic creatures while ignoring the [...]

Please welcome Cory Shank to That Fish Blog. Cory is an on-staff marine biologist here and our resident “Coral Guy.” Take a look below to read his thoughts on the future of wild coral.
Corals reefs are enjoyed by millions of people each year, while on vacation or in the comforts of their own homes. [...]

One of the most frequently asked questions that customers who are considering their first aquarium ask is how hard is it to clean and maintain an aquarium, particularly if they’re thinking about a saltwater aquarium, because they may have heard that it is very difficult to maintain. If you have a few basic tools, and [...]

Note:  Please see Part I of this article, New Facts on Vision, Florescence and Movement, for natural history and other general information.
 
General
Mantis shrimp engender strong feelings among marine aquarists – to many, they are highly valued pets – responsive, complex and long-lived.  However, small specimens sometimes arrive unnoticed among live rock and make themselves unwelcome [...]

Please welcome back Patty Little to That Fish Blog. Patty has previously written such articles as Water Gardening in Natural Ponds & Preparing Your Pond Plants After Winter. Please welcome Patty Back to That Fish Blog.
As aquarists, we may find ourselves in a constant quest to find the next unique and interesting creature to enhance [...]

Surprising new information about aquatic invertebrates is uncovered every day…the following is a small sample, which I’ll add to from time to time.  Please see Part I of this article as well.
 
Good and Bad Pets
The venom of the tiny blue-ringed octopus, Hapalochlaena maculosa, is one of the most toxic known, with the amount delivered in [...]

Knowing where to start and stop when it comes to writing about invertebrates is a real problem – any single group could keep one occupied for a lifetime. Today I’d like to highlight some interesting facts concerning a few commonly kept types and their relatives. I’ll add to this from time to time.
General
Invertebrates (animals without [...]