Seabass asked in PetsFish · 1 decade ago

I have a 20 gallon community freshwater tank w/ 5 guppies, 2 platies, and a dwarf gourami. Cani fit some neons

I have a 20 gallon community freshwater aquarium which houses 5 guppies, 2 platies, and a dwarf gourami, oh, and one otocinclus. Could I still fit a mini school of 6 neon tetras in there?? I have an air stone and a filter, but I may be getting a new filter sometime, onne of teh aqua clear 30 gallon filters. My water temp. is about 79 constant. Can I fit some more neons, and if so, how many would you reccomend?

11 Answers

  • 1 decade ago
    Favorite Answer

    yes without a doubt, i have a 50 gallon and have 30 fish in it, alsorts like platties and tetras, with room to spare, so i'd say you could have about 5 neons.

  • 1 decade ago

    The rule is supposed to be 1 inch of fish per gallon of water. Neons are schooling fish and need to be in a group of 3 or more, so you could do six. What kind of filter do you have now? You don't want to put too many fish if the filter is small because then it will cause the ammonia to rise in your tank. I have an aqua clear 50 on my 20 gallon, but that's because I have goldfish in it. The aqua 30 is good too. Good luck, hope this helps!

  • 1 decade ago

    The answer is, conditionally, yes, BUT how long has the tank been running? If less then 2 months then NO, no more fish right now. If longer than 3 months, then yes you can add some fish. But I would get a better filter first, and I would also keep the other filter running in addition to the new one. 6 neons would be ok.

    Do you have any live plants. That would be nice too.

    Source(s): I have many fish, but have a dog and birds as well.
  • 1 decade ago

    If the tank has been cycling with fish in it for over 3 months then yes you can add neon's, and i would try to add 6. They tend to do better is schools since they are schooling fish. Aqua Clear filter is a great filter, but the Penguin filter is a good one as well. It has a bio wheel that holds Good bacteria that helps break down nitrite and ammonia.

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  • 1 decade ago

    lord love a duck people it's a 20 gallon tank

    try 10-15 neons, the guppies will school with them, probably the platys too

    otocinclus also like pals, get a couple more of them too

    small guys are fine in a big tank like this

    BIG WARNING!! Both guppies and platys are live-bearing fish and very prolific. If you have couples, you will soon have more and you must be prepared. You may even be better off getting rid of them now (at the fish shop) before you have problems.

    The new series of Aquaclear pumps are very nice, I am pleased with my most recent one, the 30-gal model you speak of

    79 is too hot, maybe 72-74

  • 1 decade ago

    Yes maybe 6 more but remember that neon's are small and your platties or guppies might eat them. Remember that the smallest fish in your tank should be at least 3/4 the size of the largest fish.

    Heres a guide on how many fish to put in an aquarium.

    Virtually every fish owner has gazed at their aquarium and wondered just how many fish can be put in there. Unfortunately aquariums don't come with a stocking chart slapped on the side. As a result many owners unwittingly overstock their tank, sometimes with a disastrous outcome. So how does a fish owner know how many fish they can keep? There are a number of factors to consider, as well as several methods for calculating safe stocking levels.

    One Inch Per Gallon Rule

    The most widely known rule for stocking a tank is one inch of fish per gallon of water. While this type of calculation works as a rough estimate, it leaves plenty of room for error. Like people, fish are not all the same size and shape. Stocking a ten-gallon tank with ten inches of slender shaped zebras is not the same as stocking it with ten inches of full-bodied goldfish. Larger bodied fish create far more waste, and therefore require more water volume.

    Furthermore, the fish often are not fully grown when first brought home. The adorable little catfish that is scarcely an inch long today could reach a half foot in size when it grows up. The true adult size of the fish must be used in the calculation. However, many owners have no idea how old their fish is or how large it will grow to be. Before making a decision, always research the fish in question to determine the true adult size.

    Another place for error is assuming the size of the tank is equivalent to the number of gallons of water it holds. A ten-gallon tank filled with gravel, rocks, plants, and an assortment of decorations does not hold ten gallons of water. In reality the water volume is often ten to fifteen percent less than the size of the tank.

    So while the one-inch per gallon rule is a reasonable yardstick, it has it's flaws.

    Surface Area Calculation

    The larger the surface area of the water, the greater the oxygen exchange, which in turns supports a larger number of fish. Therefore, surface area of the water directly impacts how many fish can be kept in an aquarium. A tank that is tall and thin may hold the same number of gallons as a tank that is short and wide, yet they have vastly different surface areas.

    Using the surface area rule, the shape difference between the tanks is taken into account. The surface area is calculated by multiplying the width times the length of the tank. Under the water surface area rule the tank can be stocked with one inch of fish for each twelve square inches of surface area. However, this calculation has many of the same flaws as the one-inch rule. For instance, it assumes a fairly slender fish, which isn't always the case. If wide-bodied fish will be kept in the tank, the calculation should be changed to one inch of fish for each twenty inches of surface area.

    Like the one-inch rule, the surface area rule isn't perfect. Its primary advantage is that it takes into account unusually shaped aquariums.

    Which Calculation to Use?

    As a general yardstick for normal situations, the one-inch rule works adequately and is very easy to calculate. If using it, always use net gallons of water, and take into account the adult size as well as the shape of the fish. If the aquarium is a non-standard size, the surface area rule will work better than the one-inch rule. In either case, always do your homework first, and err on the side of going under the limit rather than over.

    Also do not fully stock the tank all at one time. No more than 25% of the total volume of fish should be introduced at one time. Fish wastes, which are toxic, are eliminated by colonies of beneficial bacteria. Those bacterial colonies need time to adjust to changes in the bio-load. By introducing fish a few at a time, the bacterial colonies have sufficient time to grow and take care of the toxins produced by the fish waste.

    Suggested Reading

    Aquarium Sizes

    Stocking a 10 gallon Tank

    Mini Aquariums

    The Nitrogen Cycle

    How an aquarium cycles

    Fishless Cycling

  • Chris
    Lv 5
    1 decade ago

    i reccomened not to if your tank is not yet cycled. but if you may but first get a couple they might breed and have more. you will have more problems with your guppy they will multiply and when the spawning season is over you will have not 5 but 5000 fry in your 30 gallon tank.

    i would not highly reccomened you to change your filter beacuse there are some bacterias in your tank stored.

    Good Luck With Your NEon TETRas

  • Anonymous
    1 decade ago

    I believe you would be all right with neon's but remember you can figure on 1" of fish per gal. of water. Good Luck

  • 1 decade ago

    Yes u can add six neons. but u must keep tank clean. U can add more fish if u r ready 2 give more attention 2 ur hobby.

    U may visit my web ---

    Happy fish keeping ------- bharath

  • 1 decade ago

    General rule of thumb for fresh water fish:

    1 gallon of water for every inch of fish. remember they do grow.

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