Levels fluctuating

[tang daddy]

While ca is not bad to bump up quickly, I think long term you gotta figure out what your tank consumes weekly then adjust accordingly. I admit when I was setting up my doser Param's bounced quite abit as ca was low and same as mg,
But once my alk stabilized I've been testing weekly and it's rock solid for months.

I had lots of po4 built up in my tank which slowed the growth of sps and coraline, this played a big impact on how much of the big 3 gets consumed especially alk. Our tanks is a constant adjustment, this is what makes it fun. If there was nothing to tinker with one could get bored....

If you're testing a lot you must be going through test kits. Like Gary said if you can afford to or see one come up Fs in your area get the Hanna for phosporous and alk, I find them to be a lot more accurate.

Do you use a measuring cup or digital scale to measure the bulk Chems?