Green deposits on container

Appreciate advice /info on this little symptoms.
I just done my first hydroponic with White Widow auto and got just over 100 gram ( wet) for single plant… Did not grow big around 50-60 centimetres, buy the buds are fully loaded ( using led).
The only thing i found that towards the end i noticed green, algie looking deposits on my container and around my little stones in mesh holder.
Is that normal or I’m missing something?

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some algae is normal to prevent it keep containers light proof and keep top layer of lecca dry

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Appreciate, thank you for your info. :+1::+1::+1:. Wasn’t much but was not sure. Possibly because i cud only use white container.

Paint it easy fix

Will do Donald :+1::+1: