ELOS USA Test Kits are very accurate and reliable for testing your reef tank. ELOS are generally more expensive but are more lab grade and provide better test results for your aquarium water conditions.
ELO's Test kits and products are becoming much more popular and were difficult to get. ELOS now has become a standard in test kits for aquariums and products. ELOS is a high quality test that will give great accurate results for your aquarium water testing.