Great Aquariums Start Here
Live Chat Support
    Free Shipping
  • FREE Shipping ON $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
99% of items we carry qualify for FREE SHIPPING in the contiguous United States if you spend $75 or more. Learn More
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 2 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Testing Equipment  » Calibration Solution  »  HM Digital pH Electrode Storage Solution
HM Digital pH Electrode Storage Solution

HM Digital pH Electrode Storage Solution

Average Rating 5 2
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: HM Digital pH Electrode Storage Solution
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
In Stock: Buy now and your order will ship the next business day
This item is in stock in our East and West Coast warehouses
Item #:
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

+ Add to Wishlist
Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
FREE Shipping Promo offers FREE standard ground shipping via UPS on orders of $75 or more for orders containing non-overweight or oversize items (orders which do not qualify for our FREE shipping promotion will still be shipped at a discounted rate).

Terms and Exclusions:
  • Offer valid only on orders shipping within the contiguous United States. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam or other US Territories do not qualify for this promotion.

  • This promotion does not apply to items requiring expedited shipping, such as refrigerated products, frozen products or live rock.

  •'s FREE shipping promotion does not include products sent in oversized or particularly heavy boxes. This may include but is not limited to aquariums, canopies, chillers, external water pumps, metal halide magnetic ballasts, stands and substrate/sand. These items may be subject to additional shipping handling charges. Should shipping surcharges apply, they will be noted on individual product pages and / or displayed during check-out. We will, however, pay a portion of the shipping charges for these orders.

  • Shipping surcharges, such as special handling are NOT covered under the FREE shipping promotion.

  • Shipping charges for returned merchandise is non-refundable. Please read's Return PolicyPolicy for more information.

  • Price matched (Low Price Guarantee) or discounted orders do NOT qualify for our free shipping promotion.
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.
Shipping Cost*
Competitor's Website*
*Required information
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

HM Digital pH Electrode Storage Solution Information

ZT-2: Basic TDS TesterTDS-EZ: Economy TDS TesterTDS-3: TDS Meter with CaseEC-3: Conductivity Meter with CaseTDS-4: Pocket-Size TesterTDS-4TM: Pocket-Size TDS/TemperatureAP-1: AquaPro Water Quality Tester (TDS)AP-2: AquaPro Water Quality Tester (EC)COM-100: Waterproof EC/TDS/Temp MeterPH-200: Waterproof pH MeterORP-200: Waterproof ORP MeterTM-1: Digital Thermometer

QC-1: Quick Check MonitorSM-1: Single Line TDS MonitorDM-1: Dual TDS MonitorDM-2: Dual TDS Monitor 2FM-1: Filter MonitorFM-2: Filter Monitor with VolumizerCT-1: Clean Tap MonitorPM-1: Purity MonitorPM-2: External Purity Monitor

PS-100: TDS ControllerPS-200: Dual TDS ControllerPS-202: Dual Display TDS ControllerPC-100: Conductivity ControllerPSC-150: Extended Range EC/TDS ControllerPSC-154: TDS/EC Controller with 4-20mA OutputCIC-152: Dual Control Dosing/Injection TDS/EC Controller

TDS Calibration SolutionspH BuffersORP Buffers & Test KitpH/ORP Electrode Storage SolutionTDS/EC SensorsController CoverWater Flow SwitchFlow Sensor pH/ORP Electrode Storage Solution
  • For use with HM Digital's PH-200 and ORP-200. Always make sure your sensor is kept in an electrode storage solution. If dry, refill the cap with the OP-STOR storage solution.
  • Part #OP-STOR
  • For use with the PH-200 or ORP-200
  • Convenient size
  • Total volume: 60 cc
  • Contents: Specially formulated KCl solution for pH and ORP electrodes (sensors)
  • Bottle: Combination twist off and eyedropper style cap

Manufacturer Info

HM Digital, Inc.
Established in 1987, HM Digital, Inc. (formerly known as Heemang Electronics) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter.

HM Digital pH Electrode Storage Solution Reviews

Average Rating
(2 reviews)
Sort Reviews By:

Good product, Great Service

Reviewers Rating Excellent!

Posted: 7/20/2014 from HIGHLANDS RANCH, CO UNITED STA
5.0 5
Experience Level: Beginner

Comments: Product is convenient and helps preserve expensive pH probes. Marine Depot service is awesome! Thank you!

Did you find this review helpful? Yes No

Just what I needed

Reviewers Rating Excellent!

Posted: 10/21/2011 from BERESFORD, SD UNITED STATES
5.0 5
Experience Level: Expert

Comments: The product is good but the focus of this review is the awesome service I get from the great people here at the website. If you haven't purchased from them yet, DO IT! Prices are competitive and in most cases lower. Customer service is outstanding!

2 of 3 People found this review helpful, did you? Yes No

WIN A MEDIA REACTOR! Sign up for hot deals, helpful videos, and a chance to win an Accel Aquatics FR-30 Media Reactor!