Giesemann Professional Nitrate (NO3) Test Kit
Giesemann Professional Nitrate (NO3) Test Kit

Giesemann Professional Nitrate (NO3) Test Kit

Brand: Giesemann
Item Number: GM-TSTNO3-011

Regular price $16.99 On Sale

Only 5 left in stock!

Estimated Arrival: Between Apr 12 and Apr 18. *ETA for USA only. For accurate lead times, call us at 727-214-7750

Large, Custom, Or Backorder: Arrival Times May Vary.

Shipping Policy: Little or No Shipping Charges for Regular-Sized Items; We Cover Part of the Freight Costs for Large Items Shipped Nationally. See Shipping Policy.

Giesemann Professional Nitrate Test (NO3)

Nitrate (NO3) is a chemical nitrogen compound and contains nitrogen as a major component, which is a key nutrient for corals. Nitrogen overconcentration however leads to over fertilization and thus to increased algae growth.

Nitrogen is essential for all species to promote growth. Therefore, the right concentration of nitrogen and thus nitrate is especially important for every saltwater aquarium. The optimal value for nitrate in saltwater aquariums ranges from 1 mg/l to 10 mg/l. With its very accurate lower measurement range, the Giesemann nitrate test kit  is specifically suited for reef aquariums with stone coral populations. In natural saltwater, the nitrate concentrations only range from 0.01 – 0.5 mg/l. Stone corals with short polyps (SPS) in a saltwater aquarium should ideally be kept at nitrate concentrations between 1.0 to 2.0 mg/l.

The Giesemann Professional Nitrate (NO3) Test Kit, due to its very precise measurement range up to 4 mg/l, is primarily intended for owners of coral reef aquariums with stone corals and other nitrate sensitive corals.

The regular testing and proper maintenance of Nitrate (NO3) levels will not only create and sustain a healthier, more vibrant, and more successful reef aquarium, but will also result in happier coral owners by preventing catastrophic algae blooms that could greatly harm the tank and cost the owner hundreds or thousands of dollars of environmental damage as well as weeks or months of repair time.

The Aquarium Doctor; Your Quick and Easy Reef Health Diagnosis

The Giesemann test program encompasses eleven different tests for all relevant water parameters. All test kits are especially easy to use and provide precise measurement results. High-quality color cards and an unmistakable color change of the reagents guarantee an unambiguous and reproducible water analysis.

  • Highly precise measurements in laboratory-grade quality
  • Specially designed for saltwater application
  • Calibrated dropping bottles for a constant drop size
  • Well balanced measurement reagents for safe and consistent handling
  • Simple, illustrated, multi-language user manual to ensure easiest setup and testing process 
  • High-quality color cards and unambiguous change of color provide very high accuracy
  • Identical measurement results, even for repeated tests
  • Strict quality control and batch testing to show consistency of quality over time 
  • Shelf life of up to 4 years without any reduction in quality
  • Laboratory-grade quality at an extremely competitive price
  • Up to 40 tests per box

Element in Natural Seawater: 0.01 - 0.5 mg/L

Element in Aquarium (Optimum Amount): 2-10 mg/L; 1-2 mg/L for optimum coloration of SPS)

Shelf Life: Up to 4 years

Tests Per Box: Up to 40 tests

Testing Procedure/Walkthrough: See Instructional Use Outline in the "Downloads" tab.

Here is the online user manual and Instructional Use Outline for the full line of Giesemann Test Kits.

Giesemann Professional Water Analysis Test Kit Instructional Use Outline


Terms and Conditions of Warranty 

All Giesemann products contain a 1 Year Limited Warranty after date of purchase against material defects and assembly errors.

For being granted the warranty, the device must be submitted  with all necessary parts and together in a single common container with the completed warranty form and sales slip.

All product warranty is under the discretion of CoralVue Aquarium Products.

CoralVue reserves the right to void any warranty if improper use of the product is found; such as water damage, saltwater corrosion, salt creep, excessive heat due to improper installation, electrical surge, power failure, and improper maintenance. CoralVue reserves the right to void any warranty if improper modifications are made to any skimmer pumps. Neither Two Tides Aquarium Supply or CoralVue in any way covers personal injury, personal loss, or damages associated with the use of these products.

Returns and Replacements

All warranty repairs are performed by CoralVue.  If you have an issue with a Giesemann product, either contact us at so we can help walk you through the process, or submit a support ticket at to provide a claim. If a return is required, a Return Merchandise Authorization number will be issued to the ticket. Please do not return a product without an RMA number.

Product replacements are done at the discretion of the support representative or technician. If a product is deemed defective and replacement is needed, the product will be replaced with an equal product. In the event the product is no longer available, CoralVue will provide the customer a product of similar specifications and performance.


Exchanges are not generally accepted with Giesemann products (as a replacement item is usually sent upon original product defect). However, in extraneous circumstances, exchange products may be optional. Contact us at and we would be happy to clarify things for you.


Our standard cancellation time frame is 48 hours after time of purchase. All orders cancelled after 48 hours are subject to a 15% administration fee, whether or not your order has shipped. If you order has shipped, you (the buyer) will also be responsible for return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.

In almost all cases, cancellation refunds initiated by Two Tides are processed to your bank almost instantly. However, we always throw in a possible processing time of 1-3 business days in case of any extraneous circumstances. This almost never happens, but this window is essentially giving our team the time to sort out the problem in the rare event of a refund not immediately processing.

Once the refund is processed through from us to the bank of the card you used for purchase, that bank will then need to process the refund in order to show the refunded balance on your bank statement. This can take anywhere from 1-5 business days or longer depending on your bank. We recommend you call or visit your bank to check what the processing time will be to receive your refund.

Shipping Return Items

Please package the returned product with peanuts, bubble wrap or other reputable proper packing material. Also include proof of purchase, a note stating the problem and provide your return address information. Once CoralVue receives the product, they will repair or replace it and will work with Two Tides to send it back to you in a timely manner. All items are returned via Fedex Ground or US Post Office. If you would like it overnight or second day please request expedited shipping pricing through your support ticket.

Please send the product to:

Attn: Returns
38183 Commercial Ct.
Slidell, LA 70458

Please make sure your return address and RMA number is on the box.

PLEASE NOTE: Product warranty is for NEW, UNUSED items only. 
OPEN BOX DEALS do not apply and are voided of manufacturer warranty.


All orders from CoralVue are shipped via FedEx or USPS and are re-packaged in heavy duty packaging to ensure your products arrive in top condition. We will email the tracking number along with a copy of the invoice once it has been processed. Most orders have a 3-5 day processing time.

In the event of a back order, we will contact you via email and/or phone to inform you of the back order, and we can figure out how you would best like to move forward. Shipping charges vary with the size of the order and customer location.

Typically CoralVue ships with FedEx Ground service unless otherwise requested. Signature service is required ONLY on high value shipments or if requested by the customer. Normally we do NOT require signatures on Ground packages. For large freight shipments we use Fedex Freight.

Damaged Shipments

All damages must be reported to both Two Tides Aquarium Supply ( and to the CoralVue office WITHIN 48 hours of receipt. Please email or call both T wo Tides and CoralVue to notify of any damaged products that you receive. Failure to adhere to this requirement may result in denial of credit. Please be sure that you have received all cartons you are signing for and that none are damaged before successfully receiving your shipment.

Stolen Packages

Here are the steps to take if your package is stolen: 

  • Search everywhere. Look behind and under objects, check with neighbors, your apartment office, and previous addresses for your package. 
  • Locate the tracking number. Pull up the tracking details and ensure the package was indeed delivered, and where the package was left. 
  • Reach out to us at Two Tides or the helpful team at CoralVue to file a report or claim. 
  • Wait 36 hours after the expected delivery in case it turns up.
  • Contact the shipping carrier. They can also work with us directly on the matter.
  • File a police report. Call the non-emergency line and give as many details as possible, including photos and video if you have a security camera.

ALL "Stolen Package" claims submitted to CoralVue MUST INCLUDE a copy of the police report. 


Return Rules

  • Eligible returns must be shipped at customer’s expense.  
  • You must have an RMA# to return the item. 
  • To obtain an RMA#, please submit a ticket at and include a copy of the original receipt from the order of the product. No returns will be accepted without a copy of the paid receipt.
  • Please ship the elegible items(s) first class, prepaid, and insured to:

Returns Department [RMA#]
38183 Commercial Ct.
Slidell, LA 70458

  • Products must be unused and in good condition with the original packaging and documentation attached.
  • All accepted returns to be refunded will be refunded in the original form of payment.
  • Shipping and handling costs, gift box costs and other charges are non-refundable.
  • All returns are subject to a 20% restocking fee. However, returns that meet the warranty requirements do not contain a restocking fee. 

Return Restrictions

  • In the case of items damaged during shipment, please contact the CoralVue customer care team immediately at

    Receiving Credit for Your Return

    • You can expect a refund in the same form of payment originally used for purchase within 30 days of our receiving your return. Your refund will include the cost of the item, plus any applicable sales tax, less 10% restocking fee if applicable, less the cost of return shipping if applicable.
    • Sorry, shipping and handling costs are non-refundable.
    • Gifting and gift card/special offer charges are non-refundable.

    Damaged or Defective Items

    • In the case of items damaged during shipment, please immediately contact the CoralVue customer care team immediately at

    Have any further questions that aren't answered here? We'd love to hear from you, and learn how we can help you be as successful as possible in this wonderful hobby.

    You can call in to 727-214-7750 to speak with Tyler from our team to determine how to create your Ideal Aquarium Build.

    Also feel free to reach out to us at and we will aim to respond back within the next few hours.


    Have a Question?

    Be the first to ask a question about this.

    Ask a Question

    Customer Reviews

    No reviews yet
    ★ Read Reviews of Two Tides

    The Proof is in the Result

    43 reviews
    Best Bang for your Buck!

    I’ve used these lights on my Nano Reef tanks for well over a year now so I decided to roll the dice and run four over my newly purchased Prostar 200 Aqaurium even though they aren’t intended for larger tanks. Paired with the 18 inch flex mounts these lights offer a clean high end look for under $1K. The best part is they can provide enough even solid PAR spread to run a mixed Reef tank if you plan accordingly. The app is easy to use when you get the hang of it and their website has plenty of presets that you can download to make set up a breeze. If your looking for a high end reef capable light without the high end cost and bulky appearance then this is a good choice.

    Thank you Tyler for getting these to me quickly!

    Really is a quality tank and stand at the best price I could find

    I bought the ProStar 200 (150g) n white. It did take a while (5 weeks) for the tank to make it to Arizona, but it was worth the wait. The tank glass is burly, well beveled, and the black silicone seams are really well done. In my case I couldn't find a single thing wrong with the tank or stand on arrival.

    Pre-installed plumbing + conversion kit (separate purchase) made the plumbing, including an inline UV sterilizer, super easy.

    The stand is spacious, with a good sized sump while still leaving sufficient overhead space for taller equipment, mounting lights for a refugium, getting your hands into the different sump compartments, etc.

    As almost every other review has mentioned - Tyler Moon really does show an extraordinary level of customer service throughout the experience - buying, setting up, and beyond. Fully expect frequent communication from him via text and phone call to make sure things are working out smoothly.

    Another positive I thought I would highlight regarding circulation noise between sump and display. Everyone's system will vary, but I found the draining system with spiral silencer inserts and silencer caps to be very quiet. With a 2000 gph DC return pump I can strike a good balance between the return flow and gate valves on the pre-assembled drain lines such that I get super quiet draining as well as maintain the water height in the display that I want. With the return pump at 100% and the drain lines wide open I do get quite a bit of noise, but I am not looking for 2000 gph during normal operation from my return pump on a 150g tank.

    Easy enough

    The kit installs just like any PVC slip coupler - glue in place. Seems like good quality schedule 40. I'm sure there are logistical challenges, but just a thought - since the tank comes with preassembled plumbing for drain and return lines, why not add in the step of also using the conversion kit BEFORE shipping to customers? From what I've read and seen, it's basically impossible to get fittings in the US for the metric sizes the tank comes with. Someone is clearly already doing the pre-assembly. Ship them a box of the conversion kits and add that as a step to the pre-assembly.

    Excellent Tank, Service and Shipping

    The whole experience was an A+. As soon as the order was placed I got a call letting me know they were doing a QA check and getting it packed for shipping. A couple days later it was delivered on a freight truck. The shipping was fast and tank was packed very securely. The tank was beautiful and without any defects. I highly recommend two tides and will use them in the future.

    Perfect in every way

    These guys are amazing and you can’t beat these prices. Don’t be fooled just because the pro star doesn’t cost as much as it’s competitors, the tank is absolutely beautiful and perfect in every way. One huge plus is that the stand comes pre assembled which saves you hours of work. The customer service is superb, Tyler Moon is there for you from the time you place your order, delivery and any issues that may come up. I’m very happy I didn’t end up buying Waterbox or Redsea and stumbled on TwoTides.