1)Amount of light you are using? watts/gallon
2)CO2 injection?
3)Base substrate?
If all of the above are done properly and you see new plants sprouting out, the chances are high that your plants are shedding their old leaves while adjusting to the new conditions.
Remember correct amount of light and CO2 injection are vital factors to getting a good start in planted tanks..some of my experience...actually nothing compare to those experts around []
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