Excellent 
Take the guesswork out of your feeds with the VIVOSUN pH & TDS Meter Combo.
This handy twin-pack gives you quick, accurate readings of both pH and EC/ppm, so you can mix nutrients with confidence and keep your plants in the sweet spot for growth.
If you want healthy plants, balanced feeds are essential. This combo makes it simple, giving you the core information you need every time you mix a tank.
Nutrients are only available to your plants when pH is in range; outside it, elements lock out and deficiencies appear. At the same time, knowing EC/ppm ensures you’re feeding the right strength — not underfeeding or burning roots. This combo gives you both readings fast, helping you hit the sweet spot with every mix.
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