Mini fishes for a 7 gallon community tank

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Mr. Aqua 7.5 gallon tank comes in two different types of glass. Either standard glass which is going to be the most economical option, as well as a low iron glass which gives the tank an extra clear appeal making the glass almost invisible. Most standard glass will give a slight discoloration to your fish and corals, but unless you are looking at the two tanks side by side it is hard to see a difference with the naked eye. For the slight extra cost of the low iron glass with the Mr. Aqua tanks, we would highly recommend it.
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The Mr. Aqua 7.5 Gallon Bowfront tank is an awesome little nano tank that can easily be placed on your desk, kitchen counter, or really anywhere with its small size. The small pico tanks are best for smaller species of fish, corals and invertebrates. Many people will use these tanks for a single species of coral, or invertebrate that may be a bit harder to keep in a larger community system. The Mini bow front tanks can be drilled on the backs as they are not tempered if you wish to add a sump or closed loop water flow system. outlet Aquarium Kit 7 Gallon Fish Tank Starter Disney Desk Top Home Decoration Filter
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I wouldn’t recommend a 17-liter tank for a fancy goldfish. If your fantail is still young, you might get a couple months out of it, but eventually you’ll want to purchase at least a 76-liter aquarium (or 20 gallon tank). Your goldfish may even do fine in a 38 or 58-liter tank (10 or 15 gallons) if you simply don’t have the space for a larger aquarium right now, as long as you stay on top of water changes and water testing. Make sure you also have a good filtration system (I personally use power filters in my tanks, but canister filters are also very good). If your filter needs the extra help, you can even attach a sponge filter to the glass – these filters are really good at biological filtration.My 7 gallon planted tank: 3 months old
Cube Tank 12 inches $25
Bonsai Tree dead $20
Internal Pump (magic jet filter) $20
Light $15
Fan $10
Plants: Java Fern, Anubias Barteri, and Hemianthus Callitrichoides ( i think)
Fish: Lyretail Guppy - Shrimp: Red Cherries7 gallon fish tank with two guppies and an algae eater. Comes with filter and extra cartridges, heater, bubbler, net, food, and rocks, plants and gravel20-gallon (76 litre) tanks

Tanks this size are ideal starting points for anyone entering the hobby. In the United States 20-gallon tanks are available in “tall” and “long” varieties. The tall tanks measure roughly 24 inches in length and 17 inches in depth; the long tanks are 30 inches in length and 13 inches in depth. All else being equal, the long tank is better. Long tanks offer more swimming space and have a greater surface area to volume ratio, meaning oxygen diffuses into the tank at a faster rate. You can keep more fish, more happily, in a long tank than a tall tank.
Do tall 20-gallon tanks have any advantages? Not many. They are perhaps a bit easier to decorate with tall plants and rocks, and having a smaller footprint they take up less space on a tabletop or shelf. Greater depth does work better with certain small but tall fish, in particular domesticated angelfish. But beyond that, these tanks are far inferior to long tanks for general fishkeeping and are best avoided by less experienced hobbyists.

Species useful in 10-gallon tanks will do even better in a 20-gallon tank. In the case of things like small tetras, you can keep larger groups. If you have a nicely planted aquarium, consider keeping two dozen neons for example. Otherwise some of the additional species you can sensibly keep in a 20-gallon tank include the following: