WTB pH calibration fluid 4 and 7

[hernandezkeb]

Hello.
As the title says, maybe you have extra available.
TIA

 

[Beth perwein]

Hello.

As the title says, maybe you have extra available.

TIA

You can buy that for cheap along with co2
At hydroponics shops

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[hernandezkeb]

Yah? Ok. Ill look up to it. Thank you