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| Grow Check pH meter continuous readout / wall mountable | $99.95 | |
| Grow Check TDS meter continuous readout / wall mountable | $79.95 | |
| TDS pen | $74.95 | |
| Waterproof (O ring sealed) pens that will actually float if accidentally dropped into a reservoir. |
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| pH Tester 1 pen | $94.95 | |
| pH Tester 2 pen | $119.95 | |
| pH Tester 1 replacement electrode | $44.95 | |
| pH Tester 2 replacement electrode | $54.95 | |
| TDS Tester pen | $105.95 | |
| TDS Tester pen replacement electrode | $54.95 | |
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| Dipstick nutrient TDS meter | $109.95 | |
| Nutra-Dip TDS meter - continuous readout / wall mountable | $86.95 | |
| American Marine pH meter - continuous readout / wall mountable | $109.95 | |
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| Digital test pen batteries (pack of 4) | $6.95 | |
| Electrode cleaning solution - 250 ml each of part A and B | $10.45 | |
| pH 4 Calibration solution - 16 oz. | $9.95 | |
| pH 7 Calibration solution - 16 oz. | $9.95 | |
| TDS 1000 PPM Calibration solution - 16 oz. | $9.95 | |
| Electrode storage solution - 8 oz. | $6.95 | |
| Electrode storage bottle (fits Oakton pH pens) | $2.95 | |
| pH test kit (color comparison) | $6.95 | |
| pH test strips 4.5 - 7.5 | $6.25 | |
| pH test strips 5.6 - 6.8 | $6.56 | |
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| General Hydroponics pH up - pint (8 oz.) | $7.95 | |
| General Hydroponics pH down - pint (8 oz.) | $7.95 | |
| General Hydroponics pH up - quart (32 oz) | $12.95 | |
| General Hydroponics pH down - quart (32 oz) | $12.95 | |
| General Hydroponics pH up - gallon | $29.95 | |
| General Hydroponics pH down - gallon | $29.95 | |
| Earth Juice Natural down (citric acid) - 2 lb. | $10.95 | |
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| Rapidtest soil test kit | $13.95 | |
| Moisture meter | $5.95 | |
| Soil pH analyzer (analog readout) | $32.95 | |
| Soil pH meter (analog readout) | $17.15 | |
| Fine dolomite lime - 5 lb. | $2.55 | |
| Fine dolomite lime - 40 lb. | $12.95 | |