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Old 11-18-2017, 12:14 AM
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G.Alexander G.Alexander ثeu
Join Date: Jan 2005
Posts: 35,495

Difficult to recommend a test kit if it comes to real low nutrients. I had good experiences with Hanna photometers (not the checkers as I never used one), also with test kits from Merck and Machery Nagel. For salinity I have used a device from Greissinger. Usually the other parameters like Ca, KH and Mg the available Hobby test kits from Tropic Marin, Salifert and RedSea usually working well if they are not to old.

Make sure not do dose AAHC, Coral Vitalizer and Pohl's Xtra to soon, you can start to used them when your system contains corals and when it is running nutrient poor stabile.

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