Humidity meter
Temperature meter which I have
Humidifier via I see and hear you guys talking about them?
Ph calibration liquid 4.0// 7.0?
S-P3 Fans?
I’m all 
All of the above an a water 
meter to check ur temp an hydroguard 
Why do you need Ph calibration liquid? Doesn’t the Grobo have bottles for this? Or perhaps this is just referring to distilled water?
They have a YouTube video on it u need 7.0 solution an a 4.0
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