I looked and found a few things on the forum regarding test kits but nothing too current. I'm really just looking for everyone's preference and feedback on what to get. I've been using API Test kits for PH, Ammonio (NH4), Nitrite (NO2), Nitrate (NO3), Phosphate (PO4), Calcium (Ca) and Alk (KH) for years and I just don't think they are that accurate. I've never even seen a ready on any of them that wasn't 0 except for calcium and alk. Looking to upgrade but now sure which way to go. Here's what I've found. All Salifert = $162.93 NH4, NO2, NO3, PO4, Ca, KH, Mg Seems like these used to be the #1 kits that most people used but a lot has come on the market to compete with them in the last few years? All RedSea = $160.96 NH4, NO2, NO3, PO4, Ca, KH, Mg BRS shows these as a pretty good option in some of their videos and makes them look pretty easy to use and reliable? Hanna Checkers + One of the Above= $195.96 + 71.97 NO2, PO4, Ca, KH Hanna NH4, NO3, Mg Salifert or Red Sea Seems like these would be the best choice if price didn't matter being digital and all but I hate that they don't have all of them. Seems like Nitrate and Mg would be two important kits to have. I left out ph because I already bought a Digital PH Meter and I added in Magnesium because I've never tested for that before and want to include in my measurements. I guess my question is a combination of the accuracy, ease of use and price. What kits does everyone prefer for all of the above reasons? Also, is there anything else I'm missing that most people are testing for?