calcium readings

[penny]

good day all
I'm having trouble getting a calcium reading.I used an API test kit,(aquarium pharmisutical inc.)pardon my spelling.Problem is .5mls. water then one drop regent untill you see a color change.I did this even shook the tube after each additional drop.There was no color change as i ran out of tube,it was completly full.I would like some one suggest a better test thats more accurate.Mabe the regent was old or I wasnt holding my mouth right,lol.TY everyone

[lReef lKeeper]

i like the hagen, salifert or seachem tests personally. i use them all and they are all good tests, IMO.

[wwest]

I hate test kits lol. But for Calcium i use salifert and red sea. Here is a video rob did on the salifert test kit. Both cost a little more but i think they are worth it.

Salifert Ca Test Kit - Podcast Episode 68

[penny]

thank you all very much