07-07-2010, 05:04 PM
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Originally Posted by sik80
i'm using 2 x 30w juwel day lite and warm lite on for around 10.5 hrs per day, 47 gal tank, dose flourish 1 x per week
Thanks. From this info, I would suggest your light is too much. As the intensity is more difficult to manage (unless you can remove one, but then you only have the colour of the other, and I can appreciate this combo being a good mix) the best thing is to reduce the duration. Even cutting back one hour often helps. I had this algae increasing and I reduced from 12 to 11 hours and it ended. Try nine hours a day, use a timer if you aren't already as that allows for consistency (same day/night periods).
I could suggest increasing the Flourish to twice weekly but I'd rather not until you've tried reducing the duration. I see no signs of nutrient deficiency in the one photo; if the swords were developing yellowing leaves I would increase Flourish, but for now I think the light change will help. Give it a couple weeks. What's there will not go away (unless you remove the leaf) and it will always be there but minimally. Hard to explain that. You could reduce down to 8 hours even, with the intensity you have you would still be balanced with the nutrients (though I don't know the fish load which is important for the carbon and nitrogen nutrients) but without evidence of deficiencies I don't recommend increasing nutrients (Flourish); better to bring the light down to balance.
Edit: Just happened to spot the photos of this aquarium in your log. Very nice aquascape by the way, I like it, plants look very good and healthy. Anyway, there is no nutrient issue now that I've seen the other photos so it is definitely the light. The intensity is slightly more than what will balance the available nutrients (and I saw the fish list) but not more than what I think will be OK with reduced duration. Try the 1.5 hour reduction first. B.
Last edited by Byron; 07-07-2010 at 05:09 PM..