SKU: 25739584364

Sera ammonium/ammonia-Test (NH4/NH3)

Sale price$25.16 Regular price$27.95
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

Sera ammonium/ammonia-Test (NH4/NH3)Makes it easy to monitor the ammonium ammonia level in fresh and marine water Ammonium and ammonia mainly arise from fish waste. They are converted into each other depending on the pH value. While ammonium is mostly harmless, ammonia is toxic to fish. The sera NH4 NH3 Test allows monitoring the total concentration of both (the actual ammonia level can be calculated according to the pH value the using the included chart). In case of acute danger, sera

Makes it easy to monitor the ammonium/ammonia level in fresh and marine water

Ammonium and ammonia mainly arise from fish waste. They are converted into each other depending on the pH value. While ammonium is mostly harmless, ammonia is toxic to fish.

The sera NH4/NH3-Test allows monitoring the total concentration of both (the actual ammonia level can be calculated according to the pH value the using the included chart).

In case of acute danger, sera toxivec (freshwater) or sera pond toxivec (pond) provide help. sera bio nitrivec (freshwater), sera marin bio reefclear (marine water) or sera pond bio nitrivec (pond) actively counteract lasting enrichment of these substances.

Sufficient for approx. 60 measurements.

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SKU: 25739584364

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4.6 ★★★★★
Based on 19 reviews
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Beverly K.
Battle Creek, US
★★★★★ 5
Cracked heels are gone after 5 applications
Size: Regular, Color: Cream
These moisturizing socks work great. My heels are happy again. The open toe design makes it so my feet don’t overheat at night. It only took 5 times to get rid of my painful cracked heels. Now I wear them 1-2 times a week to keep my heels healthy.
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Reviewed in the United States on January 6, 2026
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Lori
Boise, US
★★★★★ 4
Really nice but needs a few small improvements
Size: Regular, Color: Cream
Super comfortable and the gel lining feels so nice on my feet. They seem to do their job and help with moisturizing and so far the quality has been great. I deducted a star because they can be difficult to clean and may not fit wider feet. Otherwise a great value for your money
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Reviewed in the United States on December 31, 2025
S
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Sandy B
Massapequa, US
★★★★★ 5
Perfect socks for cracked heels
Size: Regular, Color: Cream
These are the best for your cracked heels. They still keep their shape and softening power even after washing.
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Reviewed in the United States on January 4, 2026
T
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Traci King
Chelsea, US
★★★★★ 5
stocking stuffer
Size: Regular, Color: Cream
I bought these for my girlfriend stocking stuffers. They work well and are reusable.
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Reviewed in the United States on February 25, 2026
B
Verified Purchase
BK
Lowell, US
★★★★★ 3
So So Socks
Size: Regular, Color: Cream
These are very comfortable socks. I machine washed them on a gentle cool water cycle and they ravelled. That is disappointing quality.
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Reviewed in the United States on April 29, 2026

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