yes there are several kits out there. aquarium pharacuticles, seachem, and selfert kits are pretty acurate. each test is diffrerent. actually there is a range for each the calcium 400-450 is good. alkalinity you want 9-12 dkh. also ph is inportant when it comes to alkalinity because as long as one is stable the other will be also. these 2 work together. a good ph is 8.1-8.4