What good is a Calcium Test Kit?

I ordered a Hagen Nitrate Test Kit from Big Al's, however they sent me the Calcium Kit, (and it say's I ordered a Calcium kit on the invoice.) Should I hassle with an exhange, or is a Calcium test kit something I would ever use in 4 Freshwater tanks, (with no live rocks or inverts.) Info on Big Al's customer servive in exhanges would also be helpful here. Thanks.

Oh, one more thing. Last time I ordered from them, I ordered an AP Nitrate Kit - which was out of stock. I may never have a Nitrate test kit.

Ooooo kayyy....I guess I won't be needing that.


Any feedback on Big Als customer service? I'm just starting school again and if it's gonna be a big hassle, I think I'll take the $7 loss. Maybe I can sell the kit to the Pet Store I work at, or exchange it with the Nitrate ones we sell, for that matter. Actually, that last idea doesn't sound so bad...

I have a kH test kit....what do you mean wetman?