• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

Changing bubbleponic's water?

How often, if at all, do you need to change the water in a small bubbleponic setup?

Its been there for about 3 months... also do you guys think its worth buying a ppm metre? Or just doing it by feel?
 
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