I'm curious, does anyone believe in back up test kits of another brand as a fail safe? One could easily amass hundreds if not thousands of dollars in corals in their tank along with equal amounts if not more in hardware, componets, tank, stand etc. If for some strange reason you received a bad test kit which didn't yield the correct results which could cause a tank crash or serious die off; would you have a back up? I have always invested in back ups with a tank full of expensive corals. Since I'm not one who employs little technology in my tank, I've always relied on close daily observation and log entries, good husbandry and back up test kits which I use if and when I have a suspious reading. How about you? Do you, don't you, or do you believe it's a waste of time?