what fish in a 20 gallon tank - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 21 Old 04-06-2007, 02:03 AM Thread Starter
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what fish in a 20 gallon tank

ok so i've decided to get rid of my damsels, guess i should have done a little more research before i jumped into salt water tanks. so now i am.

i have a 20 gallon fish only tank. i would like to get a percula or ocellaris clown, what (if any) other fish could i put in the tank? i would like to have more then 2 fish. what would you guys recommend. oh and should i get 2 clown or only one?

also i should say that my tank is still cycling so i'm not getting anything for a few weeks. just want to plan a little better this time.

thanks for the help in my other thread, and thanks in advance for this one.
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post #2 of 21 Old 04-06-2007, 05:42 AM
you could have a clown in there. we had 2 in our 20 gallon. but you can also look into things like gobies and other small fish.
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post #3 of 21 Old 04-06-2007, 12:37 PM
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I've had some mollies (because they were given to me, they aren't really saltwater) a percula, yellow tailed damsel in a 20 gallon. What the person above suggested is fine, you could maybe get a dottyback also .
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post #4 of 21 Old 04-06-2007, 03:55 PM Thread Starter
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so i was looking on drsfosterandsmith.com at fish and reading about them trying to decide on fish.

i was looking at
one percula or ocellaris clown
one royal gramma basslet or one firefish
and two green chromis.

so 4 fish total would that be too many

i cannot decide between the basslet or firefish.
according to fosters and smith the royal gramma needs rock work to hide in.
i don't have rock work but i am willing to buy some rock caves.
and they say the firefish jump, but my canopy fits good so i don't have to worry about run away fish

so how does this set up sound?
and would i be better off with one chromis (3 fish total) or would i be ok with two of them (4 fish total)

SIDE QUESTION: my water is evaporating very quickly, i've been checking the SG every day and it goes up quick from evaporation. i've been topping off the tank every other day, usually about 12-16 oz. i've been pouring it in the filter so the filter stream can mix it for me. i pour it in really slow, but i'm wondering if there is a better way to top off the tank. i'm worried cause the fish swim into the fresh water and hang out for a few seconds then take off fast to the other side of the tank.
should i take some (16oz) of the water out of the tank and mix it with the fresh water then pour it in together?

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post #5 of 21 Old 04-06-2007, 04:03 PM
unfortunately evaporation is something you are going to have to deal with having such a small tank. i have just poured the water in the tank and it hasnt hurt my fish yet.
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post #6 of 21 Old 04-06-2007, 04:07 PM Thread Starter
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thanks, how does the fish list sound?
and would i be ok to throw an anemone in for the clown, or should i wait till i am more experienced before that.

if i do put an anemone in can i still have the 4 fish or would that overload the tank?

thanks again

edit: i was thinking of a bulb anemone.
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post #7 of 21 Old 04-06-2007, 04:22 PM
it sounds fine with 3 or 4 fish. although i wouldnt get an anemone in your tank. the tank is too small and any anemone will quickly outgrow it.
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post #8 of 21 Old 04-06-2007, 04:38 PM Thread Starter
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thanks for the quick answers.

how will i know when the tank if fully cycled, as of last night my tests were

ph = 8.0
ammonia = 0.8
nitrate = 10
nitrite = 0.4
alkalinity = 3.0mEq/L
the tank has been set up for 14 days, with fish in it for about 9 days.

is there anything i need to worry about with my test results?

edit: i'm using the instant ocean test kit
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post #9 of 21 Old 04-07-2007, 12:00 PM
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no anemone, its a common mistake that people think that clowns need anemones, anything but that infact, most tank bred clowns have never seen an anemone in there life so wont even go near it. Pluse your tank needs to be a year mature before anemones. The tank will be fully cylced once you have 0 ammonia, 0 nitrite and some nitrate. May i ask what do you use as top off water?

I would only go for 2 clowns and a goby.
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post #10 of 21 Old 04-07-2007, 02:01 PM Thread Starter
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i use distilled water from the store.
it comes in gallons.
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