I want (need) a salinity meter and a pH meter. I have a Reefkeeper lite. I have looked at the Milwaukee electronic refractometer and pH meter. I have also looked at the SL2v2 by Digital Aquatics for the Reefkeeper. I like the SL2v2 for the convenience and continuous monitoring. I don't know how accurate the information is. The Milwaukee instruments have a great reputation and proven record. The pH meter can help, if I have a good one, with determining Alkalinity. Any advice as to which one I should get would be appreciated.