Create and Light a Saltwater Aquarium

Investigate a variety of plants, fish and coral that can live in saltwater aquaria. Choose a few to live in your tank then decide how to light the tank so all of its inhabitants thrive.

Plant Reflection Spectra

This is a shaving brush plant that can grow in a saltwater aquarium. Its green color comes from chlorophyll, which reflects some photons while absorbing others.

Spectrum Tool. Examine the reflection spectrum of chlorophyll A, one of the pigments that make up the plant.

Spectrum Notebook. Answer these questions in your notebook.

  1. Within the visible part of the spectrum, at what wavelength does the plant reflect the most amount of light? Is this in line with your expectation? Why or why not?
  2. Chlorophyll is the most important pigment in most green plants, and it absorbs sunlight to make food for the plant through photosynthesis. Based on the shaving brush plant’s reflection spectrum, what color photons do you think are the ones that the plant needs to perform photosynthesis to keep it healthy?
Green plants in an aquarium
Source:
Fish Tank Inhabitants — Chlorophyll A
Brightness
Full-intensity spectrum backgroundTransparency increases or decreases based on chart intensity, hiding or revealing the background
Left axis ticks
Spectrum intensity vs wavelength chart
Bottom axis ticks
Wavelength (microns)