Quote:
Originally posted by mcneilwh
Without a doubt I would go with API. A while back I had my water tested at an independent lab by ICP for Ca, Mg, Sr, and the results were very surprising. Best $60 that I every spent.
mg/L Ca Mg Sr
Lab 450 1650 27
API 450 ---- ---
Salifert 380 1350 8
The Salifert Phosphorus is better than the Red Sea, both in possible interference and sensitivity.
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I did the same thing with my tests but I happen to work at a soil lab so the test was free
My conclusion was that Salifert had the most accurate results for Ca and Mg. But with the pending problem of test kits not reading accurate I am waiting before I buy another Salifert.
API has good test kits for the price. The accuracy is not as good as Salifert but its also 1/4 the price.. I have not tried Elos but their detection range is lower than API yet their cost is similar to Salifert which IMO is a waste of money. Why should Elos cost more if their detection range is lower? But then API does not make a Mg test kit so your stuck with that one.