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Rotala can be finicky with lighting and nutrients. What's your nitrate level? If it's too low, the plant might be starving. Also, check if the light is strong enough. A 20 gallon with a sponge filter might not have enough flow for nutrient distribution.


Nitrates are around 10 ppm, so not super ...

My Rotala is losing leaves like crazy, and I don't know why. The tank is a 20 gallon, with a sponge filter, and I do weekly water changes. The light is on for 8 hours a day, and I use root tabs. Any ideas what's going on?