Top 10 for the 10-Gallon Tank - Tropical Fish Hobbyist Magazine

These simply grow far too large for a 10 gallon tank, let alone a community tank with other fish.
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Get only a few fish to begin with. Something cheap (reason: the most likely time for fish to die is cycling) because you have to the cycle the tank (jump start the bio filter). Ammonia peaks are common and sometimes deadly. Tetras, anything expensive, otos, and delicate fish are bad for this stage of your aquarium. Cycling usually takes about a month. I usually get cheap guppies to cycle my tank. Test the water daily. Once the ammonia results even out consider the tank cycled. then add fish at a rate of about 2 a wk at the most so the bio filter can have time to catch up. An inch of fish per gallon is a good rule of thumb for fish that are not heavy waste producers. Goldfish are bad for 10g tanks as they grow to big and produce alot of waste. Feed them daily only what they can eat in several minutes. Test the water daily and don't forget to treat tap water before you use it (I use aquasafe) and assure it is the same temp. do a partial water change and syphon the gravel at least every two weeks.
I enjoyed this article. I think that fish stock you had when you were young was the standard for 10 gallon tanks of the day, unfortunately.
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A tiny (1" long) puffer fish that thrives in a 38 Litres (10 US G.) tank. These curious little fish are also exceptionally aggressive. In a 38 Litres (10 US G.) tank, decor should be dense planting, caves and bogwood, these fish need to be kept busy. In terms of stocking, two males should not be kept as they will fight to the death. It's generally recommended to keep 2-3 gallons per fish, so therefore in a 38 Litres (10 US G.), you can keep 2 females and 1 male. Or 3 females. In a tank smaller than 10 gallons he is much better off alone, even if you have the  for tropical fish.
Photo provided by FlickrThe Top Choices for Stocking a 10-Gallon Tank - Rate My Fish Tank
Photo provided by FlickrNano Fish For A 10 Gallon Freshwater Tank? | My Aquarium Club
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How many fish can I have in a 10 gallon fish tank is a common question among aquarium newcomers though it's quite an open question where there is not one definitive answer as it depends on a lot of different factors like the type of fish and size. Let's cover this question in a bit more detail and we will also give some suggestions on what we think are well suited for a 10 gallon aquarium.This does of course depend on the size of the fish. A larger fish might need up to 2 or 3 gallons of water all for itself. The trick here, when wanting to add multiple fish into a 10 gallon tank is to add mostly smaller fish because it means that you can add more of them. For this reason, we have a list of the different types of fish which are suitable to have in a 10 gallon tank, especially ones that can live together.The real question here is what kind of fish you can stock up in your 10 gallon tank. The number is something that you can really only determine from seeing it. However, that being said, a general rule of thumb is that you can have up to 2 or even 3 smaller fish for every gallon of water. A betta is a great choice for a 10 gallon tank. However, cory cats and neon tetras are both schooling fish, meaning that they live in large groups in the wild and feel safe in large numbers. I've found that cory cats can get along alright in smaller groups, but neon tetras are much more skittish and do best in groups of 6, bare minimum. I had a school of ~40 in my 120 gallon; they were so much fun to watch!There are several different fish which you can comfortably add into a 10 gallon tank and have them living in unison. Remember that you can’t add a ton of all of these fish into your tank because there are spatial requirements. Keep in mind that two small fish should have one gallon of water, and one larger fish should have at least a gallon for itself. The math is up to you to do.Almost solely depends on the fish you want to put in. Look into fish you’re interested in and look at their maximum length and size along w/ their behaviors. Are they schooling/shoaling fish? How active are they? Where in the water column do they prefer? What type of environment do their wild counterparts live in? Generally 10 gal tanks are stocked with one single species, in a tank so small its hard to mix species or are dubbed “micro-tanks” and are they are stocked with around one to three species of smaller fish. Another popular set up for 10 gals, especially single species is to make it a planted take. This helps the tank look more visually appealing and interesting even if there’s only one species of fish or a few individual fish in the tank. There are many aquatic plants that don’t need high levels of light or additional CO2 that are easy to care for.