Great Aquariums Start Here
1-800-566-3474
    Free Shipping On $175+
  • FREE Shipping On $175+
  • 14-Day Low Price Guarantee
  • 14-Day Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on Orders Over $175
FREE Shipping on
Orders Over $175
Standard ground shipping (1-7 business days) starts at a low $5.99 and most orders over $175 ship FREE. Learn More
14-Day Low Price Guarantee
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
Same Day Shipping
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
Show: per page
Grid View Grid List View List
Sort by:
51 - 75 of 86
Kent Marine Float Valve Kit For RO and RO/DI Units

Kent Marine Float Valve Kit For RO and RO/DI Units

The FVKITKENT allows an RO to fill a reservoir to a desired level, then shut down water production completely.  This kit works from pressure only, no electricity.  Included within this kit is a pressure solenoid, float v...

$56.99
Pressure Gauge Only: 1/8 inch NPT

Pressure Gauge Only: 1/8 inch NPT

Pressure guage for easy troubleshooting. 1/8" NPT **Variations of this product can be found in many online stores. The version we carry is of the highest quality. Although this item is eligible for price matching under our...

$14.99
Replacement TFC Membrane Housing

Replacement TFC Membrane Housing

Replacement TFC Membrane Housing: 1/8" FPT x 1/8" FPT x 1/8" FPT. **Variations of this product can be found in many online stores. The version we carry is of the highest quality. Although this item is eligible for price m...

$18.99
HM Digital Triple Inline TDS Monitor

HM Digital Triple Inline TDS Monitor

The TRM-1 is a three-sensor TDS monitor that can monitor the TDS levels at three different points. It is perfect for RO/DI systems and other types of filtration and purification systems. Features Displays TDS levels of the t...

$44.99
Captive Purity Bulk Deionization Resin

Captive Purity Bulk Deionization Resin

Bulk Deionization Resin. Enough to fill one refillable DI cartridge. * Make sure to pack the cartridge tightly to avoid channeling / bypass.

From $11.99
SpectraPure® MaxCap 2-Stage Add-on Assembly System

SpectraPure® MaxCap 2-Stage Add-on Assembly System

Max-Cap DI Retro-Fit Kit, 2 Sta w/ Silica Buster, 10in Clr Carts, TDS Mtr, w/Filt Wr Everything you need for most systems to add a two stage DI to your RO system with MaxCap high capacity DI cartrdige.

$105.99
Inline Carbon Filter - 1/4 inch FPT x 1/4 inch FPT

Inline Carbon Filter - 1/4 inch FPT x 1/4 inch FPT

Inline carbon filter with 1/4" FPT fittings on both ends. Designed to be used as a pre R/O filter . Granular activated carbon filter used to reduce taste, odor and chlorine taste and odor. Great for ice makers, refrigerators, bev...

$17.99
SMC Ball Valve

SMC Ball Valve

SMC Ball Valve 1/4 in FPT x 1/4 in FPT **Variations of this product can be found in many online stores. The version we carry is of the highest quality. Although this item is eligible for price matching under our Low Price ...

From $6.99
Captive Purity Clear Refillable 10-Inch Cartridge for DI Resin

Captive Purity Clear Refillable 10-Inch Cartridge for DI Resin

Standard 10-Inch refillable cartridge for DI Resin with Twist-Off Cap A great way to save money by using a refillable cartridge. Simply discard the DI resin once exhausted and new resin. Be sure to make sure new resin is tightly...

$7.99
Captive Purity 35 GPD Compact RO

Captive Purity 35 GPD Compact RO

Captive Purity represents the highest quality in reverse osmosis technology. Captive Purity Reverse Osmosis Systems meet stringent standards and far exceeds the quality of systems from other manufacturers. A wide variety of option...

$84.99
SpectraPure® Single Tank Liquid Replenisher

SpectraPure® Single Tank Liquid Replenisher

SpectraPure® Liquid Level Controller (LLC-S) Single Tank Liquid Replenisher Liquid Level Controller for use with system up to 90 GPD For automatic replenishment of evaporated liquid and liquid level control on single tanks,...

$119.99
SpectraPure® High Flow Booster Pump Kit for Automatic Flush RO/DI Systems

SpectraPure® High Flow Booster Pump Kit for Automatic Flush RO/DI Systems

High Flow Booster Pump Kits for SpectraPure Auto-Flush (-AF) Systems For all SpectraPure Automatic Membrane Flush RO & RODI Systems up to 100GPD. They use a 24Volt DC, 2.5Amp Universal (110-240VAC input) Power Supply. This pow...

$159.99
Captive Purity Deluxe RO Filter System

Captive Purity Deluxe RO Filter System

Captive Purity represents the highest quality in reverse osmosis technology. Captive Purity Reverse Osmosis Systems meet stringent standards and far exceeds the quality of systems from other manufacturers. A wide variety of option...

From $118.99
Mur-Lok® 1/2 Inch X 1/2 Inch In-Line Ball Valve

Mur-Lok® 1/2 Inch X 1/2 Inch In-Line Ball Valve

Color: Grey Mur-lok Part# : G0820825 Tube O.D.: 1/2" Mur-lok fitting information Mur-lok® Polypropylene Fittings have a dual o-ring design at each tube connection, giving end users confidence in their fitting connections. ...

$7.49
SpectraPure® Maxpure 90 GPD RO System

SpectraPure® Maxpure 90 GPD RO System

SpectraPure® MaxPure Systems incorporate a high-silicate removal TFC membrane, a 1 micron MicroTec Sediment Filter, and a Carbon Block Filter. MaxPure Systems are available from 25 gpd (95 LPD) to 180 gpd (680 LPD) production rate...

$159.99
HM Digital Waterproof pH Meter

HM Digital Waterproof pH Meter

Professional Waterproof pH/Temp Meter Very reliable waterproof pH meter measures with an accuracy: of +/- 0.02 pH. Measures pH and Temperature Auto-ranging three point calibration with digital fine tuning Includes 4...

$79.99
SpectraPure® Color Indicating Ammonia Removal DI Cartridge

SpectraPure® Color Indicating Ammonia Removal DI Cartridge

SpectraPure® Color-Indicating Ammonia Removal DI Cartridge is optimized for maximum ammonia removal in RO/DI systems. This deionizing cartridge also removes silica, heavy metals, nitrates and phosphates. For post R...

$26.99
Captive Purity Chloramine Removal Carbon Block Filter Cartridge

Captive Purity Chloramine Removal Carbon Block Filter Cartridge

More than 10 percent of municipalities use chloramine for water treatment instead of chlorine. Standard carbon block filters only treats for chlorine and will allow ammonia and other impurities to reach your aquarium. A chloramine...

$20.99
Kent Marine Shut-off Valve

Kent Marine Shut-off Valve

The SHUTOFFKIT allows RO unit to shutoff or stop producing waste water after the float valve closes. Parts Include: Tubing, Solenoid, JACO18NIP, JACOTEE, JACO18L, JACO18S, CHECKV Note: Not recommended for level control in aquariu...

$42.99
Plastic RO Tube Cutter

Plastic RO Tube Cutter

Plastic tube cutter Cut polyethylene, nylon, or polypropylene with this easy-to-handle razor/edged tube cutter. It closes automatically, assuring clean and square cuts. It may also be used with vinyl, teflon®, polyurethane, rubbe...

$16.49
Captive Purity Single Deionization Canister

Captive Purity Single Deionization Canister

A quick and easy way to add De-Ionization to any RO system or to add a secondary DI stage to any RO/DI system. Standard Add-On DI includes clear canister with mounting bracket, Color-Change DI cartridge and 10` of RO tubing.

$43.49
SpectraPure® Drinking Water Kit For RO/DI System

SpectraPure® Drinking Water Kit For RO/DI System

Model # : DWK-DI-03-N Drinking water kit with 3 gallon storage tank for RO/DI systems SpectraPure® Spectra Drinking Water Kits include a space saving 3 gallon pressurized tank, a manual tank shut-off valve, a water conservi...

From $144.99
SpectraPure® Deluxe Piercing Saddle Valve for 1/4 Inch Tubing

SpectraPure® Deluxe Piercing Saddle Valve for 1/4 Inch Tubing

Deluxe piercing saddle valve for 1/4" tubing (Not recommended to use for systems that produce 180 gpd)

$7.99
Captive Purity 3 Gallon Drinking Water Kit for RO and RO/DI Systems

Captive Purity 3 Gallon Drinking Water Kit for RO and RO/DI Systems

Captive Purity Drinking water kit with 3 gallon storage tank for RO and RO/DI systems The Captive Purity Drinking water kit allows you to easily convert your RO or RO/DI system in to an under-the-sink drinking water system. N...

$79.99 $69.99
SpectraPure® MaxCap 1-Stage Add-on Assembly System

SpectraPure® MaxCap 1-Stage Add-on Assembly System

Max-Cap DI Retro-Fit Kit, 1 Sta, 10in Clr Cart, TDS Mtr, w/Filt Wr Everything you need for most systems to convert a single stage DI to a dual stage DI with MaxCap high capacity DI cartrdige.

$77.49
51 - 75 of 86
This item is temporarily unavailable but will be back in stock soon.

Item #
Price:
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.

Your Email:
Just enter your email address below and we'll let you
know when the product you are looking for becomes available!

Item Code:
Price:
Your Email:
Marine Depot Newsletter Signup
Aquariums, News & Culture
Join 100,000+ readers who receive weekly tips, videos, deals and giveaways.