AP Master KIt $12 online and more tests!
I just got the AP Master kit online from PetSolutions and it has dropped the KH and GH tests and added the nitrate test and, as someone mentioned, now the Ammonia test is 2 bottles and Salycilate based so tells you actual harmful ammonia, not bound plus unbound.
KH and GH are typically stable for most water supplies, but not all, and I think the trade is worthwhile. Nitrate is much more necessary to monitor than KH and GH, except for those injecting CO2, of course.
I just got the AP Master kit online from PetSolutions and it has dropped the KH and GH tests and added the nitrate test and, as someone mentioned, now the Ammonia test is 2 bottles and Salycilate based so tells you actual harmful ammonia, not bound plus unbound.
KH and GH are typically stable for most water supplies, but not all, and I think the trade is worthwhile. Nitrate is much more necessary to monitor than KH and GH, except for those injecting CO2, of course.