Saltwater Aquarium/None


Hi, I have some questions for you about saltwater aquariums.

1. I heard that saltwater aquariums are wasier to care for when they are larger, so I'm thinking about getting a huge aquarium, I mean very huge like 30,000 plus gallons. But I live in a city far away from the coast so how do add so much salt in my aquarium?

2. After how much time, would I have to change the water of my aquarium?

3. Can a shark live in such an aquarium? Not G.W.S for sure but the smaller sharks like Nurse shark etc.


Hi Jem:

See the answers to your questions below.

1.  Yes, the general rule of thumb is the larger the aquarium, the more stable the water parameters are to maintain. You can purchase synthetic sea salt commercially.

2.  Water changes are based on bio-loads, bio-loads are based on the quantity of fish and/or coral you have.

3. Yes, many species of shark can be kept in captivity, like the Bambo shark.


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David Ocreef


Technical saltwater coral reef related aquarium questions are welcome. Coral, invertebrate, and peaceful species of saltwater fish questions are welcome. Questions asked on Saturday and Sunday will be answered the following Monday. REMINDER: Please check the answers pool to see if your question has already been asked and answered. Questions typically are answered within a 48 hour period, however sometimes it may take longer.


I possess over twenty-five years of hands-on experience and knowledge in the ecology of aquariums. Beyond the traditional, I have successfully tested and sustained environments that have been uncharted territories for hobbyists, for decades. I am the first to admit I don't know it all because there will always be something new, amazing, and exciting to learn about, as discoveries are made. It's a hobby one can never outgrow, or grow tired of.

MASNA - Marine Aquarium Society of North America. Director of Orange County Reef Aquatics -

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After High School, my experience and love of marine animals influenced me to take up studies in Marine Biology. Throughout college, I studied Microbiology with an emphasis on Marine Life, as well as numerous other sciences. I continued to advance in this hobby, by building a dozen or more saltwater ecosystems all utilizing Microbes as the major source of my filtration method.

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