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Welcome back...I remember you.....

How old is the light bulb, kelvin, watts, photoperiod, is there a partition between the light bulb and water, how far is the light from the water, what kind of substrate and how deep, is this glass or acrylic tank, how long has the tank been running, any filtration-what type

Its normal and expected to have some algae in a container of water that has both light and nutrients, however, since its a closed system we have to control it with manual removal on occasion-
With live plants its important to balance the system so that the plants can out compete the algae-when you have an excessive of algae-sometimes adding more plants can help, change the light bulb if its nearing 12months of age, proper kelvin to support photosynthesis, clean the partition for best light to plant penetration or remove it all together, increase photoperiod 10-12h/day, provide more nutrients for the plants....

You need to get the plants happy and actively growing to out compete the algae......If this is a glass tank-use a razor blade to remove as much algae from the walls that you can-make water change to remove the spores daily for a few days.

Can you post a pic....
 

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If you are leaving the light on from 9am to midnight-15h a day...thats most likely the problem....get a timer and get on a 10-12h/day photoperiod and see if that help.....also, make sure the glass between the light and water is really clean...
 
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