New to the game ! - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 6 Old 07-12-2011, 06:56 PM Thread Starter
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New to the game !

I have a 30 gallon tank with a Aquaclear over the back filter for a 50-70 gallon tank. I have the following fish in it.

5 glow fish
1 small angelfish
1 Rainbow Gourami
1 Gold Gourami
1 Bala Shark (2inches)
1 iridescent shark( 1 1/2 inch)
1 Spotted Ralphael pleco
1 Flying Fox

I consider myself more then a noob but less then a novice if that makes sense. This setup has been running for about 5 months now. Things are going very good. My tank pretty much sustains itself and the ammonia is always at 0% and the PH ranges 7.0 to 7.2. Water heated to 72 degress. I am told that 12 fish is alot for a 30 gallong, but the 5 glow fish are very small and could probably be counted as one fish. Basically I want to know if I can add some more fish or should I stop here. I was thinking about getting 2-3 albino cory catfish to scavenge the bottom since I heard they are great little workers at keeping the bottom of the tank clean. I am just looking for some help and guidance. I hope I posted in the right section.
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post #2 of 6 Old 07-12-2011, 07:36 PM
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This is probably not what you want to hear but the following fish on your list should probably not be in your tank.

Bala shark (grows to 14-16")
Iridecent shark (grows to be 4ft)
Spotted Raphael (grows to 8")
Flying Fox ( grows to 6")
Angel fish (needs at least 55 gallons when they grow up and should be in groups)

That being said everything else you have works great in your tank. If you were to sell the fish that don't really go well with your tank you could actually ad a pretty large group of cories to your tank (8 or so) without problems.
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post #3 of 6 Old 07-12-2011, 09:00 PM Thread Starter
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well i wasn't really looking to have that many albino cory's in my tank, i know they do better in a large group, but i was going to purchase 2-3, so ur saying the main reason i cannot have those fish is because of the size they will be in years to come ? which means i would have to get rid of them, what are some things you can suggest ? the main reason for the cory's was bascially "maintenance". the 2 gouramis and little glow fish don't really do it for me. im basically limited because of my tank size , right ?
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post #4 of 6 Old 07-13-2011, 01:02 AM
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There are some limitations to the abilities of your tank based on size. That being said, the best thing you could do is get rid of the fish that will get too big for your tank and then research some options for your tank. If you want a community aquarium you actually have TONS of options for fish that will make your tank very colorful and fun. In your research, you need to make sure you are looking at the "end" size of the fish since petstores generally sell fish when they are quite young. This means a 1" fish in the store may end up growing to be 10" later on depending on what type of fish it is. There are actually many fish that get no more than 5" when they are full grown.
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post #5 of 6 Old 07-13-2011, 11:35 AM
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Welcome to Tropical Fish Keeping forum. Glad you joined us.

I agree with what's been said. Perhaps I can explain "why" a bit. Potentially large fish need space, a lot of space, in order to develop properly as they grow. Fish continually grow, and it is not only the physical space but the water quality resulting from that space. Smaller volumes of water more quickly become problematic as they fill with the bad stuff--organics, dissolved waste, pheromones the fish release--and this affects the fish's growth considerably. In too small a space (for the fish) problems with the internal organ development occur, what we term stunting; deformity, immune system weakening, and almost always a shorter lifespan.

Secondary to this, are problems behaviorally. Science knows that fish maintained in too small a space usually become more aggressive as they mature. With naturally-aggressive or territorial fish (such as the shark, gourami, angelfish) this usually means much worse aggression, but even otherwise normally peaceful fish can become aggressive. It is the fish's only way to lash out due to its frustration. Keeping shoaling fish (which are fish that live in large groups in their habitat, like your Glofish danio) in too small a group, less than 5, also cause this increased aggression. Things may "seem" OK now, but it is like the proverbial powder keg just waiting for something to explode it.

Other members have previously written of similar situations where all seemed fine, until one day the Red Tailed Shark suddenly lashed out and killed 2 or 3 other fish overnight. The stress leading up to this was immense. We must do what we can to prevent it.

We have fish profiles here, second tab from the left in the blue bar across the top of the page, and you can find most of the regularly-seen fish listed. Information on numbers (for shoaling fish), minimum tank size (only for the subject fish, other fish can increase this), behaviours, compatible fish, environment needs (rocks, wood, plants, light, etc) are given for each species. IF the name (scientific or common) is used in posts exactly the same it will be shaded so you can click on the name to see the profile, example Red Tailed Shark, Bala Shark. Please have a read.

If you can return the fish to the store, great. Some of them will be real problems in very short order. Then you can plan the sort of tank you want. There are as someone mentioned many options for a 30g. First off, what are your water parameters, hardness and pH, out of the tap? It is easier to select fish that will manage in your available water than it is to have to adjust the water for specialized fish, which is not always easy. You can find out about tap water from the water supply people, many have a website with data on the water.

Once you know the water, you can decide on the sort of habitat you'd like to create. A flooded forest, with lots of live plants and sedate colourful fish in groups; a stream with gravel and boulders, some plants, and stream fish; and so forth.

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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gingerael (07-13-2011)
post #6 of 6 Old 07-13-2011, 03:00 PM
angel could be kept in a thirty but it would need to be a mated pair.Ammonia should always be at zero and good that it is but check for nitrate

38 gallon :
Pelvicachromis Taeniatus Nigerian Red not yet breeding pair
4 Pangio Kuhli
12 Hemmigrammus Bleheri
2 Botia Lohachata
1 Botia Straita
1 Ancistrus Sp.
6 Poecilia Reticulata

The Wet Spot Portland Oregon!!!!!!

ADA: Do!aqua Iwagumi 10 gallon size!
7 Clown Killies
7 Ghost shrimp
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