Jump to content

Recommended Posts

I’ve heard Cory say that plants can’t see blue light and only algae can in a live stream or video. Is this true and if it is then why do companies even put blue leds in lights? I’m battling this hairy green algae growing on my val and some other plants. I have no idea what type of algae it is but I can only describe it as a dwarf green hair algae and it’s not regular green hair algae.image.jpg.a4ed2d9a1c60fd0b8f2108a1e2e447ef.jpg

Link to comment
Share on other sites

Aquarium Leds use a range of colors for looks. If you buy an led strictly for growing plants they are usually very heavy on red lights with some blue mixed in. Algae can grow quite prolifically with only blue that's why blue night lights tend to cause issues for people. Blue LED are used to make white leds so they are cheaper. I personally like my tanks to be a bit more on the blue end of the spectrum.

Aquatic plants aren't as studied as crop plants but blue light is often used to regulate growth and flowering in various ways. 

Here is a short write up about the effects of blue light:


  • Like 1
  • Thanks 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...