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Algae eats a lot of things. But being a plant you can be sure that it creates its own food through photosynthesis.

However, algae needs extra nutrients to help it along. Cheif among these are 2 things

1. Nitrates - produced through the nitrogen cycle, fish waste (ammonia) is converted by bacteria into nitrite, which is then converted by other types of bacteria into Nitrate. Algae will use nitrate as a fertilizer.

2. Phosphate - Phosphate can be found in many things, but certain types of algae begin to thrive when enough phosphate is present.

So that's what algae eats.

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13y ago

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