I really really like my salifert tests. I use API for ammonia and nitrite all the rest are salifert.
Also if you like gadgets they have the hanna digital meters. You just put a water sample in and it depending on the test you get an immediate result. Right now they only make the hanna for phosphates, alkalinity and calcium. I had all three meters but the calcium test was HORRIBLE!
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.