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swords need alot of ferts in the substrate and alot of light. Light should be on 12 hours or so. I would up your lighting and feed the substrates with root tabs. Prefer ones with iron. Then monitor Nitrate and Po4, make sure u dose No3 Po4 and K. swords will need all that in balance to be healthy. How old are the lights? if over 6 mos they could be losing they intensity. Maybe a bulb change would be in order.
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