I highly recommend if you are not running C02 to make sure you dial the lights way down at their max brightness lol. I can see these creating an algae farm in a non co2 tank. I have mine running at 80% with full fertilizers, and co2 and I am still getting some algae.I just bought 2 of these for my 75 gallon. Not a high tech setup and just starting to plant my scape, but the coloring from the lights are awesome. Glad I went with the Finnex ALCs I debated for about 3 weeks and finally pulled the trigger, wish I had done it sooner!