We are Washington, D.C's premier location for all of your horticultural needs.
Located at 3744 10 St. NE, Washington, D.C. ; 20017
Call us at 202-248-2483.
Open 7 days a week Mon-Fri 11-7pm
Sunday 11-6pm
We are Washington, D.C's premier location for all of your horticultural needs.
Located at 3744 10 St. NE, Washington, D.C. ; 20017
Call us at 202-248-2483.
Open 7 days a week Mon-Fri 11-7pm
Sunday 11-6pm
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$26.90
This Base solution is formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at...
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$10.76
This Base solution is formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at...
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$125.06
Gro'chek Replacement Probe for H19813-6
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$189.95
This continuous reading meter is ideal for agricultural, horticultural, and hydroponics applications where pH and...
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$54.85
pH combination electrode Ultem body double-junction, refillable, cloth junction, gel filled, 1m cable
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$104.36
This EC tester has been specifically designed to address the needs of operators in hydroponics,...
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$103.46
Waterproof and chemically resistant, this monitor has been designed to meet the grower's need for...
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$107.96
This pH indicator has been designed to meet the grower's need for equipment suited to...
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$175.46
Here is a waterproof tester that offers high accuracy pH, EC/TDS, and temperature measurements in...
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$189.86
This continuous reading meter is ideal for agricultural, horticultural, and hydroponics applications where pH and...
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$102.56
This tester has been specifically designed to address the needs of growers in hydroponics, greenhouses,...
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$222.26
This indicator continuously monitors the three most crucial nutrient parameters in hydroponic, greenhouse, and horticultural...
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$125.06
Keep your GroChek HI9813 pH temperature meter running strong with a companion replacement probe. The...
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$139.46
Keep your pH/conductivity/TDS tester running strong with a GroChek replacement probe. Built for the GroChek HI9813-0,...
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$122.36
This pH/EC/TDS/temperature probe probe features a fiber junction and gel electrolyte making it ideal for...
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$104.36
This TDS tester has been specifically designed to address the needs of operators in hydroponics,...
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$327.60
In just one glance it magically measures all 3 critical parameters for successful growth; pH,...
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$36.86
The pH Checker supplies users with fast and accurate readings from 0 to 14 pH...
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$175.45
This waterproof tester offers high accuracy pH, EC/TDS, and temperature measurements all in a single tester!...
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$455.95
With this direct soil pre-amplified pH and temperature probe, you can test both the pH of soil...
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$116.95
The pHEP 4 includes a dual-level LCD, battery level indicator, BEPS, replaceable pH electrode cartridge, stability...
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$130.99
The pHEP 5 includes a dual-level LCD, battery level indicator, BEPS, replaceable pH electrode cartridge,...
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$272.99
HI 9813-6 is a versatile, water resistant, multiparameter portable instrument specifically designed for agricultural applications...
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$213.95
The mini pH controller has been designed for easy, affordable installation in tight spaces, ideal...
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$34.99
Hanna's Buffer solutions are made from established formulas and are standardized with a pH meter...
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$34.99
pH 7 is the most frequently used pH buffer. All Hanna solution bottles come with...
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$60.95
The Hanna Instruments HI1333B is a combination (full-cell) pH electrode with a single ceramic junction,...
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$192.95
pH Combo Electrode Glass Body - Refillable Temp. Sensor
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$219.99
This pH controller has been designed for easy, affordable installation in tight spaces, ideal for...
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$68.99
pH electrode with 2 m (6.6') cable for HI981401N, HI981404N, & HI9815047. Why keep a...
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$64.99
The pHep revolutionized the pH industry by providing non-technical personnel with a simple, inexpensive solution...
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$29.95
Spare pH electrode for HI98103 and HI9910 with cloth junction, for general purpose, field applications....
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$72.99
Replacement pH Electrode for HI98127, HI98128, HI98129, & HI98130
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$135.00
This blend of organic acids lowers your nutrient solution's pH. It's our pH down. Don't...
Capital City Hydronics is now closed.
We want to thank all of our customers for their support and invite you to our main location.
11am-7pm Mon-Sat ;
11am-5pm Sundays
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