White substance appearing on air tube. Anything to worry about?

Tobecobestarted grow question 3y ago

Roots seem clean and there doesnt appear to be anything in the res, but a white substance has began to form on the aquarium tube. Theres definately no light leaks in the res. Anything I should worry about?

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Week 3

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Hempy_The_Kidanswered grow question 3y ago

Hard water calcium build-up. Should be fine unless you want to add filters on your water source.

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Organomananswered grow question 3y ago

Correct, just dried out nutrient salts/calcium due to evaporation. Nothing to worry over.

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