Will it be too many fish in my tank?
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Will it be too many fish in my tank?

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Will it be too many fish in my tank?
Old 11-22-2010, 04:14 PM   #1
 
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Will it be too many fish in my tank?

I'm soon going to be adding fish into a freshwater planted tank and I already have a plan. 6 Black Skirt Tetras, 4 Corydoras(Probably Bronze or False Julli), 2 Dwarf Gourami, and 1 Otocinclus. Is that too many or just right for 20 gallons. If it's just right could I fit 2-4 fish like platies. If not, can you recommend what you think could fit along with the rest of the fish?
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Old 11-22-2010, 04:40 PM   #2
 
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Note my plan may change such as having 3 platies instead of the Corydoras.
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Old 11-22-2010, 06:21 PM   #3
 
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First question is, what are your water parameters? The hardness and pH of your source water (presumably tap water) are very important as not all fish can manage in any type of water. For instance, livebearers (platies, etc) require basic harder water than the other fish you mention, which prefer soft slightly acidic water but can manage in slightly basic water.

And as I see you joined this month, may I welcome you to Tropical Fish Keeping forum.

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Old 11-22-2010, 07:04 PM   #4
 
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The tank is at 6.8-7.2 at PH and hardness I'm not sure
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Old 11-22-2010, 07:23 PM   #5
 
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Never mind, its in the 6.5-7.0 range so platies are out of the question. But, are there any other fish that could fit with the fish I listed? I want to stick away from real fragile fish like neons and rummynoses.
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Old 11-22-2010, 07:30 PM   #6
 
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The tank is at 6.8-7.2 at PH and hardness I'm not sure
I would not suggest any livebearer; chances are the hardness is low, soft water, and long-term they will not do as well. The fish you now have are fine with this pH, very much so. So now to your original question.

Some fish are shoaling fish, meaning they occur in large groups in nature and must be kept in a group in an aquarium or they can be under stress which weakens their immune system and brings on various health issues they would not otherwise have. All the tetra should be in groups of 6 (or more, space permitting).

Corys do best in a group of 5, if you want more than one species 3 of each species works fine, and in a 20g you can have 6-7 corys.

Otocinclus are also shoaling, and a group of 3 minimum works best; single fish often waste away on their own; and it is important to have algae in the tank when they are added or they can starve. They will learn to eat from sinking foods in time. They only eat common green or brown algae.

Dwarf gourami have issues; in a 20g a male/female pair will work but 2 males would be aggressive. We have fish profiles here, second tab from the left in the blue bar at the top, or click on the shaded name in posts. Check out the profile of this fish to see what I'm referring to. Also check the other fish profiles for more info.

Black skirt tetra get largish, 2.5 to even 3 inches, and there isn't much room in a 20g. A smaller tetra would perhaps be worth considering, as it will allow you more "room" in terms of water conditions.

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Old 11-22-2010, 07:43 PM   #7
 
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Would 6 black neon tetras do well? If not, what do you recommend with my water parameters? As well I do plan to get a male/female pair of dwarf gourami. Also, I'm worried to get 6 corys as some have said that it's too much so maybe pygmy cories. I just think my LFS won't have them and this is not Petco or Petsmart it's an aquarium based store. They are very well stocked.

Last edited by als1996; 11-22-2010 at 07:47 PM.. Reason: To add extra details
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Old 11-22-2010, 07:46 PM   #8
 
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Would 6 black neon tetras do well?
Yes, they would suit the tank better. You could add some neon tetra too, with your pH, for more colour; although not directly related to the so-called black neon tetra, they do look nice together; six of each. Might not with the gourami though...have you seen the Honey Gourami?
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Old 11-22-2010, 08:03 PM   #9
 
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Yes, they would suit the tank better. You could add some neon tetra too, with your pH, for more colour; although not directly related to the so-called black neon tetra, they do look nice together; six of each. Might not with the gourami though...have you seen the Honey Gourami?
Yes. I have considered a pair of honey gourami. Are there any other tetras that maybe a bit more hardy that I could put in my tank. I used to have neon tetras in my old tank, I had 6 then 3 died of and the last 3 died a month ago. I'm restarting my tank here and I've already went through the fishless cycle. As well will 6 corys not overstock with the rest of the fish I want if I go with my modified plan thanks to you it will be 6 black neons, 3 otos and 2 honey gouramis. Also, can I still consider a pair of dwarf gouramis rather than a pair of honey gouramis? I thank you for your help. I'm learning.
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Old 11-23-2010, 10:33 AM   #10
 
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Yes. I have considered a pair of honey gourami. Are there any other tetras that maybe a bit more hardy that I could put in my tank. I used to have neon tetras in my old tank, I had 6 then 3 died of and the last 3 died a month ago. I'm restarting my tank here and I've already went through the fishless cycle. As well will 6 corys not overstock with the rest of the fish I want if I go with my modified plan thanks to you it will be 6 black neons, 3 otos and 2 honey gouramis. Also, can I still consider a pair of dwarf gouramis rather than a pair of honey gouramis? I thank you for your help. I'm learning.
Provided you can get a male/female pair of dwarf gourami, they will work (but not with other gourami); they still have health issues though as noted in our profile.

As for the tetra, have a look through our profiles under characins. Look for species that are less active [this means they will be better suited to a 20g which is not a lot of space], share same water parameters as you have, and remain small/medium.

Stocking depends upon a number of factors beside tank size and number of fish. The behaviours of the fish, where they "hang out" in the aquarium, their water requirements, etc. Six bottom fish and six middle fish and six surface fish is better than 18 middle fish which would be way too many unless they were "dwarf" species. The fish themselves are important, not just the numbers.

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