How precise are the gh/kh tests? i need something that measures in the single digits.

If you are advanced enough to be testing KH, you need to move to salifert or aqua forest test kits. A bit more expensive but if you are going to start buffering, it needs to be right or you may be doing more harm than good. Time to Change!!! :-)

How many test will it do?

All I can say is, quite a lot. Because the test is performed by adding more and more test solution until it changes colour, the amount used depends on your water hardness, so the number of tests you'll be able get out of it will vary quite a lot. But I'd say it's probably good for over 50 at least.

Does the ph test kits have a shelf life

Not sure but would not rely on any brands test strips. Especially API. Recommend a JBL or Sera test kit.

Nitrate test, do bottles have the red seal on them? The ones without the red seal don't fit my stand.

No they do not have red child proof caps they are the later design that are all white.

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🧬 Dive deep into perfect water—because your fish deserve the best!

BULK 100 COUNT SUPPLY - Stay ahead with a long-lasting pack designed for weekly testing and emergency checks.
COMPREHENSIVE 5 IN 1 TESTING - Monitor pH, nitrite, nitrate, carbonate, and hardness in one strip for total water clarity.
PREVENT FISH LOSS PROACTIVELY - Catch invisible water issues early to protect your aquatic ecosystem and avoid costly setbacks.
INSTANT RESULTS ZERO GUESSWORK - Dip and compare colors in seconds—no waiting, no lab needed.
UNIVERSAL AQUARIUM COMPATIBILITY - Perfectly calibrated for both freshwater and saltwater tanks, ensuring every fish thrives.

API 5-IN-1 Test Strips provide a quick, reliable way to monitor five critical water parameters—pH, nitrite, nitrate, carbonate, and hardness—in both freshwater and saltwater aquariums. With 100 strips per box, these easy-to-use dip strips help aquarium managers maintain optimal water quality, prevent fish loss, and ensure a thriving aquatic environment.

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Pet Type	Fish
Product Dimensions	5.08 x 5.08 x 12.7 cm; 49.44 g
Item model number	33P
Flavor	FLAVOR 2
Colour	Multi-colored
Size	100 Strips
Volume	64 Fluid Ounces
Number of Items	1
Quantity	1
Batteries required	No
Batteries Included	No
Item Weight	49.4 g

API5-IN-1 TEST STRIPS Freshwater and Saltwater Aquarium Test Strips 100-Count Box

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