Combating algae by reducing light times

Discussion in 'Algae' started by Pezulu, Jan 28, 2017.

  1. Pezulu

    Pezulu

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    To try and combat a persistent BBA and free floating algae problem I am considering reducing the amount of time the lights on my planted 4ft display tank are on.
    Lights consist of an Odyssey Dual 54W lamp as well as 2 x 30W T5's.

    Currently the lights are on for approximately 10-12 hours a day, with CO2 being added at a rate of 2.5 BPS, connected to the light switch and turning on via a solenoid when the lights are switched on.

    I have been thinking of reducing the time the lights are on to 6 hours a day, in 2 cycles.
    The first cycle from about 6am-9am, and the second from 5pm-8pm.

    Should the CO2 be turned on and off with the lights using the new cycle, or be left to run throughout the day, being turned on in the morning and off at night?
    Will running the CO2 for 13 ours and the lights only for 6 hours have an effect on the tank and livestock?
    Will the 6 hours light be sufficient for sustained plant growth?

    Plants are mainly Anubia Nana, Bolbitis and some Amazon Swords.
     
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  3. f-fish

    f-fish #unspecified

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    6-8 hours solid should do the trick ... I would do that before the split.
     
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  4. kovi

    kovi

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    During the December period I was hardly at home and my planted tank lights (odyssey quad) was left on for the duration of my three week leave. My plants looked dismal, full of brown algae. Once I got the time I did a three day blackout for my tank and then increased my co2 to 4bps with my lights on for only 4hours a day for two weeks and now my plants are doing great. Looking much more greener and healthier. Now I have my lights on for a duration of 4 to 8 hours a day depending on my schedule and I see great improvements. If I'm not home the lights remain off. What helped me cut down on the lights and yet still appreciate my tank was adding three or four led chips to emulate moonlight.

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  5. kovi

    kovi

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    Sorry for the essay. Just sharing my experience. Maybe it would give you some insight through my experience.

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  6. kovi

    kovi

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    [​IMG]

    Led night lights to emulate the moonlight

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  7. OP
    Pezulu

    Pezulu

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    Does the CO2 run the entire day, or only when the lights are on, whether for 4, 6 or 8 hours?
     
  8. kovi

    kovi

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    Only while the lights are on. If the lights are off the plants wouldn't be able to photosynthesis and absorb the co2 which might lead to deaths of your fish due to insufficient oxygen levels and excess co2

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  9. Rainstorm

    Rainstorm

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    Guys, you need a timer plug. I have two for both tanks so i don't have to worry when i go away. One tank has 6 hours split into two intervals and the other is a low light set for anubias, set for 4 hours twice a day, making that 8 hours.

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  10. quattro

    quattro

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    I run a split on my tanks from 7am-11am then from 5pm-9pm. Also co2 on an hour before lights on and off an hour before lights off.
    The split works much better for me and gives me time to enjoy my tank in the morning and afternoon.
    And always remember to try and do one thing different at a time otherwise you won't know what is actually working.

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  11. OP
    Pezulu

    Pezulu

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    Much appreciated with the answers.
     

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