Dissolved Gases in Marine Aquaria: Saturation Problems and Solutions

If you’re like most marine aquarium hobbyists, you probably don’t give a great deal of thought to the levels of dissolved gases in your system beyond making sure you’re providing good aeration and circulation. But under certain circumstances, these levels can get out of whack to the detriment of marine livestock. Jay Hemdal, Curator of … [Read More]

Signs You May Need to Lower Your Reef Tank’s Bioload

The bioload in a reef aquarium increases through both the acquisition of new specimens as well as the growth/reproduction of established livestock. So, unless fish and corals are dying in significant numbers (which they shouldn’t be unless there’s a major problem), the bioload in any reef system is usually trending upward. While it’s exciting and … [Read More]

How Much Live Rock Do You Really Need?

Once hobby newcomers learn what live rock is and all the benefits it can provide in marine aquariums, the next big question they invariably ask is, “How much of it do I need for my tank?” More experienced fellow hobbyists, eager to be of help, typically respond with a pat answer along the lines of … [Read More]

What Scuba Diving Has Taught Me About Keeping Marine Aquariums

While sitting here contemplating how long it’s been since I’ve gone scuba diving (answer: way too long), it occurred to me that one can draw many parallels between the avocations of scuba diving and marine aquarium keeping. I’m not referring to the observation of marine life here—though that’s unquestionably a major element of both activities—but … [Read More]

5 Common Causes of Marine Aquarium Ammonia Spikes

You come home from a long, vexing day at work only to notice that the fish in your marine aquarium are all gasping at the surface of the water or cowering in a corner of the tank and behaving lethargically. Panicked, you promptly test your water parameters and discover that ammonia is present. The tank … [Read More]

5 Reasons to Understock Your Marine Aquarium

Over the many years I’ve kept marine aquariums, guests in my home have more than occasionally noted the relatively low number of specimens, particularly fish, in my tanks. You could say it’s been a hallmark of my fishkeeping career to understock my aquariums, sometimes to the point that they look rather sparse. But there’s a … [Read More]

6 Tips for Choosing the Right-Sized Tank for Saltwater Fish

Have you ever noticed that species profiles written about marine fish almost always include a recommended minimum tank size for the species? Have you also noticed that tank-size recommendations for the same species can vary wildly from one author, dealer, or fellow hobbyist to another? How can that be? The fact is, determining the appropriate … [Read More]