Floater Posted January 16, 2010 Report Share Posted January 16, 2010 Is 12 hours the optimal duration of light for an aquarium? 2x 1200mm 54watt T5 Juwel Day 9000K 2x 1200mm 54watt T5 Juwel Nature 4100K 400L tank approx. 8ml Flourish once a week 10ml Flourish Excel three times a week Just a plain fine gravel substrate. Plants I have: alternanthera rosaefolia alternanthera rubra bacopa amplexicaulis cardamine lyrata glossostigma elatinoides heteranthera zosteraefolia hygrophylla angustifolia hygrophylla difformis hygrophylla polsperma hygrophylla stricta lilaeopsis mauritana lysimachia nummularifolia lysimachia aurea ludwigia brevipes ludwigia perennis ludwigia repens myriophyllum variifolium rotala rotundifolia saurus cernuus shinersia rivularis water rose Quote Link to comment Share on other sites More sharing options...
N1CK Posted January 16, 2010 Report Share Posted January 16, 2010 whats lights do you have, fertilisers, substrate, CO2 + anything else?? Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted January 16, 2010 Report Share Posted January 16, 2010 12 hours is pretty standard. I change durations and colour spectra for other things like flowering etc. Quote Link to comment Share on other sites More sharing options...
Floater Posted January 16, 2010 Author Report Share Posted January 16, 2010 whats lights do you have, fertilisers, substrate, CO2 + anything else?? Added in lighting and ferts etc. Quote Link to comment Share on other sites More sharing options...
N1CK Posted January 16, 2010 Report Share Posted January 16, 2010 If there's algae you can reduce it, but otherwise its a good duration/amount of light Quote Link to comment Share on other sites More sharing options...
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