I lost quite a few sps colonies and frags because of a bad Salifert Alk test kit( read higher than the alk actually was) so i switched to API. From what i have read everywhere, not one test kit is always accurate. Some people have had bad Salifert, Elos or API test kits. So i tought i might as well save a few bucks with API. Oh and after that i got a bad Salifert test kit too
This is sooo frustrating.
I keep my alk at around 8 because i'm dosing VSV.