how much lighting for my 260l tank

lee

New Member
Joined
21 Dec 2008
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24
Location
croydon,surrey
i have had my tank running for about 6 week now,i have an arcader otl luminaire 4x39w t5,and using ferts routine from james tank sit,dry ferts,i was running all 4 bulbs at first but i was getting problems with the plants,some were growing ok some had rust spots on them,and just don't look right,i was told on another site,that i should cut my light down as a beginner ,till i know wot is doing.my question is should i cut my light down to 3 or 2 x39 t5,as my ferts routine states it work best with lighting at 2.5wpg to3.5wpg if my sums are correct 2x39w=1.4wpg..3x39w=2.1wpg and if i cut my lights down i will have to cut the ferts and co2 down as well....

tank260l,filt fluval 305 1000lph,koralia 2 600gph 1000lh pump running reactor,co2 500 bottle 4to6bps,eco complete 4 bags....
 

GreenNeedle

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19 Jul 2007
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2,720
Location
Lincoln UK
I would cut your lights to 2 x 39W BUT keep the ferts and CO2 as they are. Run it on a 6 hour photoperiod.

Each week add half an hour until you reach 8 or 9 hours

As you get experience/confidence with the growing and maintaining CO2 levels then you can increase the lighting a little.

AC
 

Themuleous

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6 Jul 2007
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4,124
Location
Aston, Oxfordshire
I would be careful about upping the light to much. I found the plants in my 250lt couldn't cope with 3x54w T5's and developed small leaves which very quickly died off. This is probably due to a lack of CO2/nutrients even despite my crazy flow rates. They were just being driven to hard by the lighting.

George tends to say 2xT5 tubes for a tank is enough, and I have to say I agree, except perhaps on very small/very shallow tanks which would probably be ok with 1xT5 if not T8 only.

Sam
 

lee

New Member
Joined
21 Dec 2008
Messages
24
Location
croydon,surrey
think im gonna stick with 2x39 t5 for now ,till i understand how to dose the co2 correctly,think im starting to work it out though ,started on 1bps,upping it a little bit every day ,on about 2 or 3 bps, drop checker showing a grass green colour at the moment..... :D
 

StevenA

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Joined
30 Jan 2008
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512
Location
Bassingbourn, Cambridgeshire.
SuperColey1 said:
I would cut your lights to 2 x 39W BUT keep the ferts and CO2 as they are. Run it on a 6 hour photoperiod.

Each week add half an hour until you reach 8 or 9 hours

As you get experience/confidence with the growing and maintaining CO2 levels then you can increase the lighting a little.

AC
Sound advice indeed 8) I've also got an Osaka 260 and only use 2 x 39w at the moment on an 8 hour photo period, and using pressurised Co2 and EI dosing, and so far so good ;)
 

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