2x39w T5 over 28usg too much ?

Discussion in 'Lighting' started by 2pods, 21 Jan 2009.

  1. 2pods

    2pods Member

    Messages:
    138
    Location:
    Gourock
    As I couldn't find a luminaire as small as big as the tank (Clearseal 36x12x15"), I ended up with this:

    http://www.ukpetsupplies.com/Details.aspx?ProdId=3088&CatId=1349&ParentId=1349
    Is it too much for the tank ?

    I would have gone for this, but didn't think the light would be even as the ends wouldn't get as much :
    http://www.ukpetsupplies.com/Details.aspx?ProdId=3092&CatId=1349&ParentId=1349
    I won't be injecting C02 as the tank is in the kitchen, won't have space for an external filter etc, so it may be two yeast-based bottles. Also I won't be going EI or carpet planting.
     
  2. GreenNeedle

    GreenNeedle Member

    Messages:
    2,706
    Location:
    Lincoln UK
    If your light is shorter than the tank then you can raise it higher. Think about MH lights. They aren't as big as the tank but when suspended higher the light spreads.

    78W over 28USG is a lot of light especially with T5!!! Is it within a hood? Can the 2 tubes be switched on and off independently of each other

    Co2 injection and method of dosing is?

    AC
     
  3. 2pods

    2pods Member

    Messages:
    138
    Location:
    Gourock
    See above i.e. Flourish once a week, and probably two yeast-based C02 bottles.
    The luminaire looks like a Arcadia, but isn't individually switched (at least there is no on/off switch), it sits about six inches off the tank, and there will be cover glass between light and tank.

    So it looks like I've been given the wrong advice then ?
     
  4. GreenNeedle

    GreenNeedle Member

    Messages:
    2,706
    Location:
    Lincoln UK
    I would say so ;(

    Are you not dosing NP? Just Flourish as traces?

    Its a huge amount of light for non pressurised!!! 2 yeast bottles may be a little better than nothing but I personally would get the light up 12" or more above the water and be prepared to use 3/4 yeast bottles!!!

    You definately need to dose N and P with that light and CO2 needs to be on the ball.

    AC
     
  5. 2pods

    2pods Member

    Messages:
    138
    Location:
    Gourock
    Well, looks like I'll be selling it then.

    I have a Rio 400 with 4x36w T8 and FE C02, but this was to do a kitchen tank.
    Oh well, that will teach me not to be so trusting.
     
  6. GreenNeedle

    GreenNeedle Member

    Messages:
    2,706
    Location:
    Lincoln UK
    Probably for the best if you don't want pressurised.

    You could go with a single starter of 39W T5HO and possibly get away with a well monitored double bottle yeast setup.

    Even a double T8 would mean 60W at 36" length so it does really push you into the pressurised needed bracket!!!

    AC
     
  7. altaaffe

    altaaffe Member

    Messages:
    309
    Location:
    Thornhill, Egremont, Cumbria
    All been said above and I'll agree totally, that lighting would be screaming out for pressurised CO2 and heavy planting from the off.
     
  8. 2pods

    2pods Member

    Messages:
    138
    Location:
    Gourock
    It'll get heavily planted OK.
    I'm just too skint and short of space to get another C02 kit (using the Aquamas one on the Rio 400) just yet.
     

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