Martini test kits are nice...I wouldn't spend that kind of money on them. I have a friend who did, very very nice...but he makes about 550,000 a year more than me
I guess not technically a "test kit" but kinda ?
There is Lamotte...(tried once and friends again) i have heard some good things about...Saw an instant ocean calcium test kit today...never noticed it before. Didn't buy it though.