how long should i leave my light on

  • We are currently upgrading MFK. thanks! -neo

joedodge

Candiru
MFK Member
Oct 6, 2008
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46
florida
i just got my t5HO fixture with a 10000k and a acitanic bulb 2x39 watt bulbs. i only have java fern anubias and crypts, how long should the light be left on for adequit growth but not making it an algae pond
 
The 10,000k will work if you add something in the 6700k range with it.Acintic bulbs will do nothing for plant growth.It sounds like you have bulbs for a saltwater set up.Just change the one and you should be good to go.
Leave the lights on for 7 or 8 hours a day and see how things go.If the plants are growing,and no algae,your good to go.
 
The goal is to replicate the natural hours of lighting in nature. From that part of the globe (origin of the fish, etc.) daylight hours are consistently 10-12 hours a day. That being said, you have to take into account the hours of dawn and dusk as the sun giving off light as it rises and sets. The "long hours" of light are great for plants (and that can be reflected in those areas of the world with really long hours, such as Canada, Alaska), but algae loves those kind of hours, too. In the wild algae also thrives along side of the plants. Unfortunately, no one is there to scrape it completely off with the exception of the occassional nibling by fish. In an enclosed system you have to experiment with hours of light to reach that happy medium of enough light for plant growth and too much for algae bloom. Best advice, keep the fish and plants happy with enough light and keep the algae scraper handy.
 
8-10 hours should be good, lose the actinic though and get a 6700k or 10000k bulb
 
blue and white bulbs 18hrs a day just like veg when u grow weed
plants themselfs should keep algee down
 
I would say depends on the plant itself but I do perfer longer its left on the better.
 
I bought my first plant today, i have been aquarium keeping for about a year now i am a bit of a plant vergin. I have a hiyang t-5 3 bulb (2 white and one blue) so is 8 hours good aswell
 
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