ELOS Test Kits

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  ELOS Expert Line Aqua Test - Calcium

  ELOS test kits have a good reputation and are comparable to Salifert in accuracy. This calcium kit uses a two-stage process — a coarse approximation (50 ppm per drop) followed by a precision refinement (10 ppm per drop) — making it roughly twice as long to complete as the Salifert equivalent. Note that Reagent A contains Potassium Hydroxide, which can burn skin.

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  ELOS Expert Line Aqua Test - KH

  ELOS test kits have a good reputation and are comparable to Salifert in accuracy. This KH kit is straightforward — count drops of reagent until the sample changes from cyan to yellow, with each drop equal to 0.5 dKH. Note that the included printed instructions incorrectly state 1 dKH per drop; the cheat sheet on the back of the card has the correct value.

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  ELOS Expert Line Aqua Test - Mg

  ELOS test kits have a good reputation and are comparable to Salifert in accuracy. This magnesium kit measures in 50 ppm increments and involves two separate sub-tests using four reagents. Like most magnesium kits it requires more steps than calcium or alkalinity testing, but the instructions are clear.

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  ELOS Expert Line Aqua Test - PO4

  ELOS test kits have a good reputation and are comparable to Salifert in accuracy. This phosphate kit uses 10ml of tank water with two reagents, shaken for 2 minutes before comparing the resulting color against a chart. Results are read by looking down through the open vial held above the included white chart.