Needing advice reef chemistry

[Animal-Chin]

I'd shoot for a lower number at first. If you raise your cal by 50 with mg that low it will find your alk and start to calcify on stuff. Your pumps will be the first thing it finds and it will seize them up. Raise your cal by 10 per day and let your tank figure out how it will wp effect it. If your coral are happy right now any dramatic swings will upset them. 50 in calcium in one day is quite a swing.

Maybe add cal and mg in the morning and test your alk in the evening and adjust if needed. Coral hate alk swings more than anything so you have to do this in baby steps....

[Potatohead]

If everything is that low the first thing I would be doing is verifying your salinity.

[sobe]

Ill head to j&l to get a salinity calibration fluid to check my refractometer. Ill do a 30g water change in 5 days interval to see if i can get mag up through water changes before i dose.

I just switch from AF salt after using up last of IO bucket.

Will test the new batch of salt mix to see if lines up with their test included on the bucket

[Potatohead]

If you have one parameter low, it's usually cheaper and easier to just add that in, rather than water changes. You can buy the bulk chemicals for relatively cheap compared to salt mix.

Usually however if all three are low, the salinity is low, so some calibration fluid is a good idea.

[sobe]

Update: im 5ppt off recalibrated my refractometer and slowly raised it up by 2ppt per day. Lesson learned.

Will test water again. Once im at 35ppt