General Hydroponics® Meter Calibration Solutions
General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.
Return and Warranty Policy
- No returns after 30 days.
- Store credit only, no cash refunds.
- No returns on: bulbs, liquids, powders, soil, growing media, or hydroponic
- Items returned within 30 days, in new condition and original packaging, subject to
15% restocking fee.
- Defective products will be warrantied when received within 30 days of purchase.
- Warrantied products will be replaced, no refunds or exchanges.
- After 30 days no warranties on: air pumps, water pumps, fans, fluorescent bulbs,
timers, thermometers, light hangers, or microscopes.
*After 30 days warranty fees may apply
**A $10 fee applies to all in-store warranty repairs.
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