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Salty Q&A: How Often Should Your Fish Fast?

by | Apr 6, 2016 | Fish, Opinion, Reef, Science

For a zooplanktivore such as Anthias, who are frequent feeders, withholding food isn’t necessarily advantageousQuestionI’ve been told that it’s a good idea to avoid feeding aquarium fish on occasion, for example once every week or once every other week. I guess this stands to reason because fish in nature can’t always get a meal. Do you agree with this, and if so, how frequently do you recommend doing it?” – Submitted by Candace Brown Answer While I don’t have an issue with the practice of occasionally fasting fish, I’m always wary of making any sort of blanket recommendation such as “Marine fish should be fasted every X number of days.” In my opinion, a much better approach is to think in terms of feeding in a manner appropriate to the particular species—which may or may not include fasting. For instance, some predatory species, such as groupers and moray eels, naturally take in large prey items in one sitting and then go without eating for a relatively long interval until another prey item happens along. With these fish, it may be appropriate to feed only once or a few times per week and then allow them to fast in between meals. On the other hand, zooplanktivores and herbivores (such as anthias and many of the tangs/surgeonfishes respectively) naturally feed frequently, if not continuously, throughout the day. Thus, in an aquarium setting, it’s appropriate to provide multiple small feedings each day for zooplanktivores and continuous grazing opportunities for herbivores.

Does a Naturalistic Environment Reduce Stress in Aquarium Fish?

by | Mar 28, 2016 | Corals, Fish, Funny, Invertebrates, Opinion, Reef, Science

The blue-throat triggerfish (X. auromarginatus) in my aquarium exhibited repetitive behavior prior to transitioning the system to a reefFor today’s post, I’d like to elicit your thoughts on an interesting phenomenon I’ve observed in my aquarium, specifically involving an aggravating repetitive behavior exhibited until fairly recently by my pair of blue-throat triggerfish (Xanthichthys auromarginatus). Allow me to set the stage: I introduced the blue-throats to my 125-gallon about a year and a half ago when it was still a FOWLR system. Their tankmates at the time included a one-spot foxface (Siganus unimaculatus), yellow tang (Zebrasoma flavescens), tomato clownfish (Amphiprion frenatus), and sixline wrasse (Pseudocheilinus hexataenia).The repetitive behavior I’m referring to—and both the male and female exhibited it—was repeatedly swimming around the base of a powerhead mounted at the far left end of the tank (as I usually face it—you can actually view the tank from either side and one end) about 5 inches below the surface. They would swim in a circle 10, 15, even 20 times or more, briefly break away and swim about half the length of the tank, and then come right back to the powerhead to swim another set of “laps.” Both triggers fed with gusto and would swim up to greet me whenever I approached the tank, no doubt assuming more food was forthcoming, and sometimes they would stop the lap swimming and explore more of the tank for brief periods. But they would always revert to that same maddening behavior. I tried moving the powerhead next to my overflow box and closer to the surface so it would be harder to swim in a loop around it, but the triggers just wiggled their way through the narrowed pathway anyway. Afraid they’d get injured or flip out of the tank, I moved the powerhead back to its original location.

Understanding Old Tank Syndrome

by | Mar 22, 2016 | Corals, Events, Fish, Opinion, Reef, Science, Tanks

In a few years, my reef will turn 50 years old. I believe I’ve avoided old tank syndrome by using the procedures outlined in this article.Old Tank Syndrome, or OTS, is something we have been hearing about since the hobby started, and I am not quite sure exactly what it means. Is it due to parameters, loss of diversity, lack of interest, diseases, metal accumulation, global warming, locusts, or all of the above? I think it is much simpler than “all of the above,” but some of those things are probably on the list of causes—especially locusts. It’s about bacteriaIn my opinion, OTS has to do with bacteria, or lack of it. Bacteria really run our tanks, and we are just there so the bacteria have something to make fun of. Without bacteria, our tanks would crash in less than a day.