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Different fish eat different amounts. Some will consume none while others will eat all available. Fish are opportunistic feeders and will therefore sometimes always act like they are starving and over engorge themselves if more than ample food is supplied. In a aquarium based setting a schedule should be followed where same amount of food is given roughly same time of day. If algae is persistent in an aquarium and a fish is purchased for this purpose, additional food shouldn't be added to the tank to account for this fish until either the fish is discovered to not be eating the algae or the algae is nearly gone. If the fish is sated on prepared food algae may be left alone. There are also other aquariums inhabitants in fresh and salt that can help with algae other than fish such as crabs and snails.

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13y ago

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