Dosing Help!

[Djbeasley05]

After transitioning my 28g nano to my 100g total volume setup I’m forced to start dosing. Water changes aren’t keeping up the elements.
Current numbers:
Salinity- 1.025
Nitrates- 20ppm
Alk- 8dkh
Calc- 340
Mag- can’t test yet
Ph- 7.8

I read that for a mixed reed I want 450ppm calcium but the ratio will put my dkh at like 12. Does this seem right? I’ve always kept my alk around 7-8 and nervous about getting it that high.

Thoughts?



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[Logzor]

You definitely want your Ca higher in the range of 450-500. I think below 400 your corals could suffer. Your alkalinity is fine at 8 dkh. I see no reason to raise it any higher. You do need to keep a close eye on it to make sure it doesn't dip below 7 dkh for any sustained period of time.

At 12 dkh you run the risk of bleaching out corals. This is especially true if you run a lower nutrient / really clean system.

[Djbeasley05]

My nano ran between 30-40 ppm on nitrates and had no issue keeping sps. I’m building an algae scrubber in this setup so I’ll slowly lower the nitrates with that


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[Logzor]

My nano ran between 30-40 ppm on nitrates and had no issue keeping sps. I’m building an algae scrubber in this setup so I’ll slowly lower the nitrates with that


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You would be surprised, running some level of nitrates can be good for SPS so long as you don't have an algae problem. It's tough to achieve the right balance.

[Reefer71]

I dose Cal and Alk only and my levels are 440 Ca and 9.2 Alk.