Oh, sorry,
test kits are recent, about a month old Saliferts'
Never tested for magnesium.
I do 10% water changes weekly, except last week when I did a 20%. I don't think Mag is wacky, because I haven't had a precipitation event, and I am replenishing Mag with the water changes, aren't I? I'm using Oceanic salt, RO/DI water.
but I'll see if I have a Magnesium test kit in my stash of fish stuff.
I don't add anything else except fish food. And sparingly, as I'm still fighting the red hair algae. My fish used to be picky about what they would eat, now they suck down anything I offer. I hope I am not being too sparing with the food....
What's happening to my alk, and why doesn't kalk drip maintain it?