Pod Eaters -OR- Mama Don't Feed Me No Balogna

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leebca

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It seems that all too often I explain some basic marine fish husbandry when it comes to certain Genus and species of specialized eaters. I am not writing about the obligate coral eating fishes. They are just plain wrong to keep in home aquariums. I am writing about those fish in the gray area of the food chain. It is those fishes that are not easy to feed because they are used to finding their food in and around live rock and substrates. Although those foods may be found in the home aquarium, the fish cannot be expected to live on what is found in the home aquarium.

How many fishes (and other marine life) do you imagine have been 'wasted' because they were acquired to correct a problem (usually algae or Aiptasia), OR were acquired by hobbyists who thought their aquarium had enough 'natural' food, then died when the food ran out? I would estimate no less than a million over the past few decades. This is part of the semi-scam to sell more marine life, needlessly.


BIGGER PICTURE

When it comes to a common dwarf Angelfish and Anemonefish, hobbyists and marine aquarists can understand that these fishes are omnivores and eat frozen foods and dried algae that we can buy at the fish store. When it comes to some fishes that eat marine amphipods and/or copepods (pods), we basically know how to provide foods for them. The Copperband Butterflyfish is such a pod eater that we can train to eat a variety of other pod-like foods and plankton. Still, there are some people that believe that they can keep a Copperband Butterflyfish in their display tank because, There are plenty of pods in the tank. Or they put a Tang or other herbivore into the display to eat nuisance macro and micro algae, but think that is all they need to feed this fish. I hope they learn the truth before they acquire the fish (and doom it to a short captive life).

Somehow when marine fishes, like the sand sifters and Mandarins are acquired, hobbyists think these fish can live off what is in the marine system and do not require feeding. Not! For some reason hobbyists do not understand that, like the Copperband Butterflyfish, these fishes cannot live off of what is in the display tank. There may be the odd aquarium where they can live, such as one that is being overfed, or an exceptionally large marine system (500g+) that can support a larger diversity of pod-life for such fishes. But neither of these is a kind of average home system.


WHAT'S LACKING?

Pod eaters, like the Mandarin fishes, live in a part of the ocean where there are not only a very large number of pods to eat, but a very large diversity of pods. Not only are there many different kinds of pods but those pods are eating a wide variety of foods. All this meets the nutritional needs of the pod eater. The marine system we put in the home cannot come close to the number and this wide diversity. The pod eaters can (and will) eat what is in the marine system, but the fish slowly dies. The fish survives for a while but does not thrive.

There is no need to worry about how many pounds of live rock is needed to support such a fish. There never is enough to support the diversity of pods needed by these specialized feeders. By the time the live rock has aged in the mature aquarium (The Mature Aquarium) the pods that are still alive have won the survival battle against their competitors -- the surviving pods have killed off or have taken the available nutrients from their competitor pods. The diversity of the pod population has diminished as these life forms have come to a kind of equilibrium.

What are these pods living on? Just the things available to them in the aquarium. This is no where near the diversity of food sources for pod nutrition found in Nature and the ocean. The pods are not nourished properly; the fish eating the pods are not nourished properly.


TRAINING

If you are considering putting a fish into your marine system that is a specialized feeder, or is used to finding its food in certain places in the ocean, you need to know that the fish must be trained to eat prepared foods, because it will not live off of what is in the aquarium. Check it out.

I am not advocating that people not keep these fishes. I am advocating that if these kinds of fishes are going to be kept, they first must go through a food training process. It takes extra time and attention from the hobbyists to keep these fishes. If they are your goal, then expect to put more effort into keeping them properly nourished. This is best served by first putting them through a quarantine procedure. ALL MARINE FISH suitable for a home marine system can be put through a quarantine procedure. These fishes can be trained to eat prepared foods and this is necessary to ensure they get properly nourished and live a long life and thriving.

An example of training a fish to eat in a quarantine tank (QT), is found here: Food Presentation. A quarantine procedure can be found here: A Quarantine Procedure.

Use food training and provide proper nutrition for (at least) these specialized fishes:
Some Wrasses
All Mandarin fishes
All Sand Sifters
All Pod Eaters (e.g., Copperband, and others)

Other than snails, new people to the hobby should not try to keep detritivores (detritus eating fishes or invertebrates).


TRAINING DONE - NOW WHAT?

Then, when these fish are properly trained, they should be put into display tanks with slow eaters to give these trained fishes a chance to eat their fill and obtain all the nutrients they need to thrive. Group the specialized feeders intelligently and consider their needs and abilities in the captive environment. If this is not perfectly done then the hobbyist has to make up their mind in advance that these specialized feeders will need to be spot fed. This will put the reader onto the pat of being a marine aquarist, rather than just a marine hobbyist.

Be prepared to spot feed your pod eater, if the competition in the tank is too great for it to get its own food at feeding time. And the bottom line is: do not keep these kinds of fishes unless you are prepared to provide the extra care and attention they need for their nutritional and environmental well being.

Here are some additional reads of people's successes with the above concepts, however pellet food and baby brine shrimp isn't a balanced diet either (seeing that wheat products can't be digested by marine fishes). Still the following is worth noting how food is gotten to the pod eater:

http://www.melevsreef.com/mandarin_diner.html

:)
 
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Okay so I have been thinking about this for days.

I have had a mandarin for about a year. I have done about everything wrong with this guy. No QT, No training to take prepared food and my tank was real young when I got him.

Soon after I got him he began to show signs of nutritional deficiency. He got skinny, fins tattered etc. I frantically looked for some prepared or live food he would eat. I found he would take tubiflex worms (I know, not good for marine fish) and got him over the hump with some target feeding of the worms. Since then Puff (the magic dragonette) has plumped up and appeared, to me, to be thriving. He is surviving on the pods in my tank and will take a few small formula 1 pellets when I feed that in my tank. I thought I was home free . . . and then I read this:eek:.

So as I said earlier I have been thinking about this. I have pondered pulling Puff out and putting in a QT to train him to eat but I am very reluctant to do that as I know it will require a total re-aquascape to catch this guy. :?:So I am wondering if there is in value in buying some of the pods that are sold retail and trying to increase the diversity of the pods in my tank? If this was done every six months or so would it help provide Puff with more of the nutrients he needs? Poor Puff, I am suprised he has survived my ignorance as long as he has.
 
I am wondering if there is in value in buying some of the pods that are sold retail and trying to increase the diversity of the pods in my tank?

And along these lines, is there a practical and effective way to feed/nourish the pods in our tank so that we can increase diversity or at least maintain it? I don't have a refugium but I can put a pile of small rock rubble in the back of my tank for pods to reproduce in. I am interested in the pod-feeding question.
 
Kris,

If the fish is eating pellets, then you/the fish is close to being trained. Take the pellets it eats and roll them in mashed shrimp paste. Move towards just shrimp bits by fooling the fish into eating it. Once you've got the fish eating something, you can usually get it eating other prepared foods. You sort of have to treat the fish like a child and slip it the right foods disguised at first.

Remember that this fish's 'taste' runs to pods. Shrimp, krill, and ocean plankton can be thought of as 'large' pods. What will be a challenge may be in getting the food the exact right size. Size is very important to these fishes. Have you tried spot feeding it freshly hatched baby brine shrimp? then frozen baby brine shrimp? etc., etc.

Try weaning and disguising techniques before considering to move the fish. If you have the patience to spot feed as you have already shown, then I think you'll be fine spending some time with 'fooling' ol' Puff.

Jan & Kris
Regarding pod populations. Mother Nature is a bit finicky. Pods in a maturing aquarium go through many population phases. Some explode in numbers, others die off. Like fishes, pods can be carnivores (some are cannibals), or herbivores.

One of the goals of the aquarist is to get the tank to the point of maturity and settling down. One of the things we want to get rid of is the micro algae. Some pods live on this, however. If these pods are in short numbers it's a good sign. So you can add phytoplankton mixes into the substrate to encourage some pod growth. For the carnivores, you'd need to add some newly hatched baby brine shrimp. But what we can add to feed pods is limited which goes back to having pods of a narrow nutritional value.

Pods mixed populations can be bought from suppliers and added to the aquarium to set off the population shifts, but the one that finds conditions of the aquarium most beneficial will usually win out over the others and the system returns to a more or less dominant species or group of pods.

It's fun(?) to watch the pods come and go from looking at drops of water taken from the substrate, LR, etc., under a microscope, as a tank gets older.

Some things that improve pod diversity are deep substrates that include mud and other broken down organic materials. These muds usually last only a few years in support of more diverse miniature life forms. But ultimately Mother Nature won't let us catch up or match our aquariums to what She can do in the ocean.

The point of my post is that the fuss over pods isn't necessary when things start off on the correct foot. :D

 
I've been trying to train my dragonface pipefish (in QT) to eat frozen rotifers but I'm not having any luck. They like live baby brine shrimp though. I give them frozen cyclopeeze also, but I'm not certain they eat that either. The only thing I'm certain about is the live baby brine...and pods.
 
Pipefish are known to be on the 'tough to train' side of the chart. Most don't live very long in captivity. Supplementing their pod diet with even the baby brine will help extend their life. Maybe try some frozen baby brine to try and get them off the 'live foods' in general? You might try to find and feed zooplankton type foods.
 
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