API Phosphate Test Kit.Tests tap water & fresh or saltwater aquariums for carbonate hardness (KH). Can be used to determine the proper dose of pH buffers.
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Competitive Pricing & Excellent Customer Service Review by Jon
Have used this test kit before and found that AQUACAVE wants the customer's business with their price match program, competitive pricing and awesome turnaround with shipping. (Posted on 9/8/2016)
Easy to use Review by Ben
Works as advertised, cheap way to check phosphate level. (Posted on 3/9/2015)