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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28
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Description
Tropical Nitrogen TestTropical Nitrogen test comes in two forms 2 for Nitrites and 3 for Nitrates. Test NO2: Nitrite Test KitA test kit for measuring the concentration of nitrite (NO2) in freshwater and saltwater aquariums. It measures nitrite levels within the range of 0 3. 3 mg L. This test is convenient and extremely easy to use. Simply add the reagent solution drop by drop until the sample changes color, then compare it with the provided color scale. Nitrites originate
Tropical Nitrogen test comes in two forms 2 for Nitrites and 3 for Nitrates.
Test NO2:
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Nitrite Test KitA test kit for measuring the concentration of nitrite (NO2⁻) in freshwater and saltwater aquariums. It measures nitrite levels within the range of 0-3.3 mg/L. This test is convenient and extremely easy to use. Simply add the reagent solution drop by drop until the sample changes color, then compare it with the provided color scale.
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Nitrites originate from fish excreta, uneaten food, and other organic waste that accumulates in the aquarium and is broken down by bacteria. The concentration of nitrites in an aquarium should be zero, as they are highly toxic to fish. The highest nitrite concentrations are usually observed in new, overstocked tanks or after treatment with bactericidal agents.
Test NO3:
- Nitrate Test KitA test kit for measuring the concentration of nitrate (NO3⁻) in freshwater and saltwater aquariums. It measures nitrate levels within the range of 0-100 mg/L. This test is convenient and extremely easy to use. Simply add the reagent solution drop by drop until the sample changes color, then compare it with the provided color scale.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.8 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Perfect pillows
Size: Queen, Number of Items: 2
Soft, but durable. Comfortable and cool during sleep.
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Reviewed in the United States on May 17, 2026
★★★★★ 4
Best pillow I’ve ever tried—hands down!
Size: Queen, Number of Items: 2
I’ve gone through a bunch of pillows over the years, but this BETU Cooling Pillow is by far the best one I’ve ever used. I sleep in literally every position—on my back, stomach, and sides—and this pillow works perfectly no matter how I’m laying.
It really does have a cooling effect, which I love as a hot sleeper. Just make sure your room is cool too, and it makes a big difference. It came vacuum-packed, but it fully expanded within just a few hours. I was able to sleep on it the same day it arrived, and it was super comfy right from the start.
I also washed and dried the pillowcase before using it, and it came out looking and feeling great—no shrinking or damage at all. Honestly, I look forward to going to bed every night now just because of this pillow. It’s supportive, comfortable, and totally worth it!
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Reviewed in the United States on February 21, 2026
★★★★★ 5
Excellent pillows!
Size: Queen, Number of Items: 2
This pack came with 2 pillows, one firm and one that was flatter and squishy. I absolutely love the flatter one! Most comfortable pillow I've ever used! The firm one was a bit too much for me, but my husband loves it.
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Reviewed in the United States on March 28, 2026
★★★★★ 3
It’s alright.
Size: Queen, Number of Items: 2
Not bad pillows. They are comfortable but mine came with an odd odor, kind of mildewy smell to it. Had to spray it down to tolerate sleeping on it.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Nice pillows
Size: Queen, Number of Items: 2
Have had these a few months and so far really like them!
They don’t really feel very cooling, but I also run VERY HOT so it could just be me. The foam holds up well and hasn’t flattened like others I’ve tried.
They come very compacted- I was shocked how much they expanded!
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Reviewed in the United States on March 22, 2026