Universal 800 in juwel rio 125

gill

New member
Oct 17, 2025
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Hi I have recently upgraded my light to the universal 800 in my juwel rio 125. I'd say this is a fairly new tank with some plated wood and Amazon swords. The Amazon sword isnt doing great and the leaves are turning black then see through and dying (unsure if due to light or lack of nutrients) what would be the best settings for this tank?
 
Lighting: The Universal 800 is a strong LED light, great for medium to high light plants. You can start from 20%, add brightness gradually.
Nutrients: Blackening leaves often indicate a nutrient deficiency—usually potassium, iron, or other micronutrients.
 
Lighting: The Universal 800 is a strong LED light, great for medium to high light plants. You can start from 20%, add brightness gradually.
Nutrients: Blackening leaves often indicate a nutrient deficiency—usually potassium, iron, or other micronutrients.
Thanks, I've put root tabs in using flourish excel but seems to be getting worse.
 
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