How to Add New Fish to Your Saltwater Aquarium - 5 Most Common Mistakes and What to Do About It

Nothing is more fun to the owner of a saltwatertemperature and salinity in the acclimation bucket
aquarium than picking out a new fish (or several) formatch that of the display aquarium
their saltwater aquarium and then getting it home toMistake #3 - Using a net to move the fish -
add it to their tank. It is so fun and exciting and isWhenever possible avoid using a net to move the
probably one of the most enjoyable aspects of thefish. And if you do need to use a net, then use one
saltwater aquarium hobby. But unfortunately, nothingwith the finest mesh possible, so that it minimizes
is more frustrating than going through the wholeabrasion and harm to the fish. Do not get me wrong
process of getting that new fish home and adding to- sometimes you just have to use a net to catch a
the tank, only to have it die within a week, or worse,fish out of a tank. But when it comes time to move
a disease outbreak occurs and all your fish get sick.the fish from the bag into the acclimation bucket or
The good news, is that most of the time, thesefrom the acclimation bucket into the tank, there
losses are avoidable. And I am about to show youreally is no need for a net.
how.Solution: When moving a fish, avoid using a net, and
Mistake #1 - Adding one fish at a time - When addinginstead use your hands, a plastic bag or small
new fish to your saltwater aquarium, it is oftencontainer.
problematic to add just one fish at a time. TheMistake #4 - Putting bag water into your aquarium -
reason for this is that the new fish is ganged up onMost new fish come in a plastic bag, which contains
by the resident fish, which is often too muchthe water from the fish store or the online retailer or
aggression for the new fish to handle. And if you arewholesaler, or from your friends tank. So why is it
adding just one fish, then all that aggression isreally bad to put that bag water into your tank? The
focused on one fish. Sometimes it is the new fishreason is threefold:
that is being aggressive, but not usually. Another- the bag water is often polluted and will likely be high
problem with only adding one fish at a time,in nitrogen (ammonia, nitrites, or nitrates);
particularly to a new tank, is that there are not that- the tank the fish came from at the fish store or
many fish in the tank, so they take much longer towholesaler may have copper in it, which is used to
learn acclimate to their new diet of flakes, pellets,keep parasites and disease at bay. This copper, if
frozen foods, etc.. When you only have a couple ofadded to your reef tank, would kill your invertebrates
fish in a new tank, they are often stressed out and(corals, snails, hermit crabs, starfish, etc.);
anxious because they do not have the safety in- the system the fish came from may have parasites
numbers benefit of being in a school.or disease, which, if added to your tank, may cause
Solution: Try to avoid adding just one fish at a time.a disease outbreak;
Instead, add new fish in groups. Make sure you doSolution: Never put the bag water, that the fish came
not go overboard with too many fish, but they willin, into your aquarium.
definitely do better when added in groups. SocialMistake #5 - Taking too long to get your new fish
feeding response improves the speed at which newconditioned to feeding - Too often a new fish will get
fish get used to eating the foods you offer. And, byadded to a tank with existing fish, and the feeding
adding fish in groups it dilutes any aggression fromroutine is not adjusted to account for the new fish.
resident fish (dilutes aggression); often adding justThe same old feeding routine mistakenly persists.
one or two fish can result in the resident fish pickingThe problem with this is that, between the time they
on them and stressing them out and even injuring orare collected and the time they are put into your
killing themtank, newly added fish have been through a lot of
Mistake #2 - Not acclimating new fish properly, or notstress. And when they are stressed, most fish do
acclimating them at all - I am often surprised at hownot eat well or they do not eat enough. This is a
many different and wrong ways I have heard onproblem, because without proper nutrition, the stress
how fish are added to a tank. Some people getI mentioned can easily result in a disease outbreak.
home from the store with a new fish and in they go.So it is kind of a sprint or rush to get them eating
Others will float the fish in the bag, in the tank, toregularly as quickly as possible.
match temperature, but do nothing to match salinitySolution: Get your new fish eating as quickly as
or pH. Depending on where your new fish is comingpossible by offering them small amounts of food
from, the acclimation method used may vary slightly,several times a day for the first two weeks. The
but the same basics will always apply.frequency of feeding is key here. At first, offer
Solution: Follow a proven and thorough acclimationwhatever they will eat. In the beginning, do not
methodworry about nutritional value. The goal is to just get
- turn off lights (make room dark); this minimizesthem eating. One of my favorite food items that
stress on the fish being acclimated and it also lessensalmost all fish seem to eat readily, and that stimulates
the likelihood of aggression from resident fishto the social feeding response, is called "Cyclopeeze"
- prepare the acclimation bucket with tank water(frozen copepods). Once they are eating regularly,
that has then been adjusted to match theyou can then add more food items with higher
temperature, salinity and pH of the water in the bagnutritional value. Also, be careful to not overfeed.
(that the fish was transported in) - and then put theMake sure there is not any uneaten food on the
fish into the acclimation bucketbottom. This can be a bit tricky when you consider
- use an air stone in the acclimation bucket orthe fact that often newly added fish will not eat right
container to keep oxygen level upaway and I am telling you to feed as often as 3-5
- using flexible airline tubing, start a siphon from thetimes a day.
tank to the acclimation bucket, and continue until pH,