API Copper Test KIT 90-Test Aquarium Water Test Kit

Very easy to use and understand results.

This copper test kit worked well when I had a bout of ich that I needed to treat in my 55 gallon tank -- I used Mardel Coppersafe (now being resold again by Fritz Aquatics). I didn't have any trouble reading the level of copper when I looked down through the tube after placing it on a light colored surface (sheet of paper works well). I will say that this kit did NOT work with the Kordon Copper Aid that I originally purchased from Petco, but seeing as I ended up having to buy the Mardel to get rid of the ich, I think it was probably something with that medication and I was afraid of overdosing because the instructions and the level of copper according to the test kit weren't even close in lining up. All in all, recommended if you are treating your tank with a copper-based medication. As a side note, my tank is planted and has black fin corydoras in it and both suffered no ill effects.

Initial review: After following the instructions very specifically, I was unable to get a reading of copper after I dosed Cupramine into my 10 gallon quarantine saltwater tank. However, after letting the test tube sit for a day, I was able to get a copper reading. Read below for the full review and results: EDIT: After letting the test tube sit for an entire day, I can actually distinguish a copper reading that seems to be nearly accurate with the amount of Cupramine I dosed. I tested ANOTHER sample of the same water, and got copper color immediately? Both tests look identical and it is actually reading right about 0.5mg/L. I am not sure if I should trust the readings, although they would be spot on with the amount of Cupramine I dosed. I'll test it with a Seachem test kit tommorow and update this review. Also make sure to follow the directions precisely, you need to remove the cap and look down the test tube with the white background of the color under the tube, but don't let the tube sit directly on top of the card, the color will appear much darker. Hold the test tube above the card an inch or two. EDIT #2 02/19/18: The Seachem Copper Test kit arrived and the results are in: 0.5mg/L. Right at the amount I dosed. Tested again today with also the API Copper Test kit. Results again, are the exact same. 0.5mg/L. This means (in my case) both the API Copper Test Kit and the Seachem Test Kit are both precise measuring tools if you are dosing Cupramine.

Arrived in good shape. I could only assume it is doing it’s testing job.

Great kit as always with API testers.

I got this because I have to medicate some new fish I have in quarantine andneed to ensure the copper levels are adequate and consistent. I'm using copper power and calculated the dose based on my water volume, to get to 2.5ppm over 24 hours. I tested the water after half of the dose was administered, which should equal 1.25ppm +-. The color reading looked closer to 1ppm. After the final dose I retested and the color reading still doesn't look much different, definitely not close to the 2.5ppm I need. I just ordered the Hanna copper high range checker as was suggested by humblereef and other aquatic sites. If accuracy is important, don't waste time or money trying to cut corners with this.

Great test kit for checking Copper. Like the other APIs easy to use. Comes with a color guide so you know how much Copper is in your aquarium and tap water. I was concerned as this can be an issue with shrimp and I was having a difficult time establishing a thriving colony. I tested all 6 of my tanks, my tap water, and a test "bowl" with aquarium water. Oddly, I was surprised to find the tap was 0, but all the aquaria had some minor traces of Copper, including my shrimp tank. It was minor, but since it wasn't in the tap, that must mean it is in the food, which if I remember correctly, is a known fact, yet it still surprised me. At least I can use this to help eliminate Copper when I suspect something is going on in one of my tanks. At least I have a baseline. I suppose I could have brought the water in to my LFS for testing, but labeling and asking for 7 tests, I thought was a bit much, so I went ahead and bought this API.

I've been doing marine/reef tanks over 30 yrs. And reviewing experienced fish Keepers, you can learn a lot. Use of copper for fish parasites is highly effective, but deadly if strict instructions are not met! This copper test is ok for experienced fish/aquariest. But i recommend a more accurate for the beginners and novice hobbiest. And most of all, time and patience must be followed.

Does exactly what it was designed for

Great product. Liquid tests are the best.

Great product

Works as intended

This test will give you a rough idea of copper levels in your tank. If that’s enough for you, then I recommend it.