Freshwater tropical fish types Guide

Aquarium Filter Selection Guide

Today's aquarium filters offer a wide variety of options to keep your aquarium water clean and healthy. When choosing filtration, base your decision on the size of your aquarium, as well as number of fish you hope to keep. To achieve the absolute best water conditions, you may need to use more than one type of filter.

Air-driven Internal Filters
These small, inexpensive box-like or foam filters are ideal for rearing fry, hospital aquariums, and small aquariums with very small fish. They are strong enough to maintain good water conditions, yet gentle enough to keep small aquarium inhabitants free from harm. Most of these devices provide mechanical, chemical, and biological filtration. These filters are placed inside the aquarium and allow you to locate your aquarium very close to adjacent walls to save space.

Undergravel Filters
As their name suggests, these filters are placed underneath a layer of aquarium gravel. These filters move water through the gravel to create conditions favorable for biological filtration. Once the beneficial bacteria colonize the gravel, they begin to efficiently break down waste materials. Undergravel filters are relatively inexpensive and rely on either an air pump or powerhead to function. Undergravel filters are primarily biological filters. However, many models feature a replaceable cartridge placed at the end of the rigid tubing to provide supplementary chemical (activated carbon) or mechanical (filter floss) filtration. These filters are available for small or large aquariums but are best suited for aquariums with a light fish load.

Internal Power Filters
Imagine a power filter you can completely place underwater. These handy filters have the space-saving feature of air-driven internal filters and the power and versatility of standard power filters. These filters provide excellent filtration and water movement since they are generally placed near the bottom of the aquarium. Waste products are removed before they have a chance to settle on the bottom of the aquarium. They are made for smaller aquariums, generally under 20-gallons.

Power Filters


Ardea Wildlife Pets Photo Jigsaw Puzzle of Silver dollar side view, tropical freshwater from Ardea Wildlife Pets
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  • PHOTO JIGSAW PUZZLE This Photo Puzzle features an image of Silver dollar side view, tropical freshwater chosen by Ardea Wildlife Pets. Estimated image size 356x254mm.
  • 10x14 Photo Puzzle with 252 pieces. Packed in black cardboard box of dimensions 5 5/8 x 7 5/8 x 1 1/5. Puzzle image 5x7 affixed to box top. Puzzle pieces printed...
  • Image Description Silver dollar side view, tropical freshwater BB-1105 Silver dollar side view, tropical freshwater Guyana Brazil Metynnis argenteus Brian Bevan...
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Feeder fish arent taken care of very well

by sibelover

Throughout their lives. They normally are kept all packed together and are under tremendous stress which in most cases causes them to get sick. I was told by a fish wholesaler not to put feeder fish in a tank with my fancy goldfish because they will stress out the other fish and transfer diseases. Plus goldfish creat so much ammonia that you cant keep as many in a tank as you can with tropical freshwater fish. I would only keep 2 in a 10 gallon no matter their size(within reason, obviously large goldfish need more room) and make sure they look healthy when you buy them, if they are laying on the bottom of the tank or are swimming funny dont get...

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