yeah, don't really need to test Calcium for a softie tank but I don't think it's bad practice to get used to testing all of those either. That's where I think many new-comers to the hobby drop the ball. They get the tank, they get the equipment, the livestock... then when they see that acan they just can't resist they add it to the tank and things are going swimmingly. Then they decide to change their softie tank into a mixed reef tank. When things start dying they say, "Why is my ultra-XXXX coral dying?" and unless it's something obvious such as red bugs or flatworms worms I'm like, "where are your water param's at?".
Then they have to try and learn the testing procedures for each kit instead of testing along from the start. Testing from the beginning (& keeping a log which I can review) gave me more insight as to what my parameters were really doing.
there's probably some great apps out there these days for smart devices (which I should look into) but I just use an old log like this...
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