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Seachem MultiTest Silicate

Seachem MultiTest Silicate - Main image
$8.36 $13.49 In stock

Category: Aquarium Water Test

Seachem MultiTest Silicate Test Kit

Natural sea water contains about 10 mg/L as silicate. In reef or other marine aquaria, silicate should be 1 mg/L or less. Silicate is non-toxic to fish and invertebrates, but is ideally kept below 1 mg/L to minimize diatomaceous algae. In freshwater, silicate is not critical. Usually, freshwater silicate concentrations will range in the area of 4–20 mg/L.

MultiTest Silicate measures silicates to less than 0.5 mg/L in marine or freshwater. This kit measures soluble silicate and reports it as silicate concentration. To convert to silicon, multiply by 0.3. It performs over 75 tests and contains a reference sample for validation.


  • Measures silicates to less than 0.5 mg/L
  • Multi-cavity plate for simultaneous testing of up to 6 tests at the same time
  • Includes reference for test validation
  • Marine and freshwater
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Customer Reviews (4.5 / 5 · 4 reviews)

Michael V. ★★★★★

The instructions are crystal clear, and I love that it differentiates between natural sea water levels and what my reef tank actually needs. Getting precise readings under 1 mg/L gives me real peace of mind.

Lily ★★★★★

Finally, a test kit that actually measures silicate down to the levels I need for my reef tank—the color chart is clear and easy to read even under dim lighting. It took me about ten minutes to get a solid reading, which felt reasonable for the accuracy it provides. This has already helped me stay b

Elizabeth E. ★★★★☆

The instructions are clear enough that my results are consistently repeatable, which is what I needed for tracking silicate levels. It took a little longer than expected to get a clear color match on the first try, but now that I've done it a few times it's straightforward.