New 30 Gallon Tank: What fish to put in? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 01-07-2013, 09:38 PM Thread Starter
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New 30 Gallon Tank: What fish to put in?

Hi I recently set up my 30 gallon high tank and let it cycle for a week and then added this "Colony" product from ATM to instantly start the cycle process. Since then I have added 4 Wag Sunset Platys to the tank. They seem to be doing just fine. I am wondering what other fish I should add to the tank in a few days. Im looking for colorful fish to set up a community tank. I was thinking of adding a rainbow shark and maybe a pearl gourami or two. What are some peoples thoughts and concerns.

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post #2 of 3 Old 01-07-2013, 11:04 PM
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Hi mcdonaldka, and welcome

First question i'm going to ask is has this tank cycled?

I'm fairly new to this myself and so i'll try and explain in the simple terms that i understand to help determine your fish.

What we really need to know in order to properly suggest the correct fish for your community is your water conditions. Fish can't really just go in any tap/well water etc and everybody s water is different. Levels of Kh, carbonate harness, and Gh, general hardness of your water, along with the ph, are very important in determining what fish you can have.

The best thing for determining this is to, if your haven't already, is to ring/google your local water supplier to find out or most display these levels on websites etc.
You could also buy the test kits to determine these yourself.

Once you know these you can determine whether you have soft or hard water etc and therefore determine the fish that are best suited to your water. Trying to do it without knowing these levels can often lead to long term problems with your fish, and can make them quite unhealthy.


As for the fish you have asked about, the rainbow shark - should not be kept in an aquarium of less than 4ft (48 inches) as it will attain a size of 6 inches, so i would guess your tank at 30 tall would be much too small for this as 4ft usually represents at least a 55 gallon. These fish are also very territorial, hence the large tank size requirements and so by putting them into a tank too small you could cause excessively aggressive behavior from them.

The pearl gourami i dont think you should have a problem with, your tank would be about on the limit size wise - i think - and could therefore manage these depending upon other inhabitants chosen and these have quite a wide range of water parameters, so depending on your answers to above, would most likely fit into your tank fine.


Other details you could throw in to help etc are levels of your ammonia, nitrites and nitrates. Do you have a tester kit for these? Or how do you test the water?
What are your tank decorations? Do you use live plants? Any and all details are helpful.

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Nilet699 is offline  
post #3 of 3 Old 01-08-2013, 05:28 PM
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I'll just add to what Nile has posted by mentioning our fish profiles, second heading from the left in the blue bar across the top of the page. Many fish species are included, with data on tank sizes, water parameters, compatibility, numbers, etc. If the name is used in a post identical to the profile name, it will shade and form a link that you can click for that profile, as you noted the fish names did in the previous posts.

Also, I'd like to welcome you to Tropical Fish Keeping forum.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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30 gallon freshwater , new tank

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