Mastering Freshwater Aquarium Ecosystems
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Fish Food and Feeding (Cont.)


Bloodworms are red colored freshwater larvae of midges. They are most often sold in the frozen form. Bloodworms are an excellent supplementary food you can feed your fish either live or frozen.


Glassworms are nearly transparent insects that live in the water in the larval stage. Glassworms are most often sold in the frozen form. Glassworms are an excellent supplementary food you can feed your fish either live or frozen.

Brine Shrimp

Brine shrimp are small shrimp that live in saltwater. These shrimp are approximately ¼ inch long when adults. Brine shrimp are the most common frozen and live food fed to aquarium fish. They are an excellent staple diet food for most fish.

Newly Hatched Brine Shrimp

Brine shrimp eggs can be hatched out in 24 hours and fed to fish fry. Photo from Brine Shrimp Direct.

Newly hatched brine shrimp are fed to young fish for the first 2 to 3 weeks of their life. You can buy dry brine shrimp eggs in a vial or can, and hatch them yourself in less than 24 hours in a jar of aerated saltwater. It is best to start a new batch every day when raising fish. Newly hatched brine shrimp lose their nutritional value quickly after they are more than 24 hours old, therefore try to feed them all to fish fry within 24 hours after they have hatched.

Boiled Spinach

Spinach is an excellent food for fish that like to eat algae and plants. Many fish that are primarily carnivores will also will eat spinach after it has been boiled. To prepare spinach for feeding, first wash the spinach, then strip off the leafy portions and boil for 10 to 15 minutes. Then dump the spinach into a strainer and run cold water over it till it is cold to the touch, then place the spinach in a ziplock baggy and flatten it out so it is not more a ¼ of an inch, and place in the freezer. You can feed the spinach in two ways, you can break off a chunk at a time and feed it to large fish and sucker mouth catfish, or for smaller fish you can use a cheese grater to create small pieces for small fish like mollies and guppies.

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