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Table 1. Parameters critical to control in reef aquaria.
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Table 2. Other parameters in reef aquaria that aquarists may want to control.
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Take calcium to 420 and alk should have a slight drop although its not too crazy but keep it closer to 11 -11.3
The Alk is higher than I would personally run, and the Calcium is a bit low; the Phosphate is high too.
The quote below is from the mod of the Chemistry forum here on Reef2Reef; it has recommended ranges for parameters (the only thing typically considered important from table 2 is Nitrate).
For both tanks, you can largely ignore Magnesium, and Ammonia - once the cycle is complete - should really only need tested in the event of an emergency (such as fish deaths, massive overfeeding, etc.). For the fish only, you can also ignore Calcium and Alk (unless you have inverts like shrimp or crabs in it, then it would probably be wise to test those as well):
For bringing Alk down, time and water changes with lower Alk water (i.e. you lower the Alk of the water in the mixing station before adding it to the tank):Thank you so much for the advice on getting me on track for what to keep to keep on my charts. What do I have to do to bring alkalinity down and phosphate down? Calcium up? You've been a great help.
Assuming the alk is high, it was suggested earlier in this thread how to lower it using acid, such as muriatic acid or sodium bisulfate to treat new salt water to give very low alk.
https://www.reef2reef.com/threads/s...in-new-salt-water-or-in-display-tanks.362825/
For the Phosphates, a lot of methods that reduce Phosphate levels also reduce Nitrate levels, and your Nitrate levels are fine; so to reduce Phosphate without reducing Nitrate, I'd probably use a Phosphate binding media like Aluminum Oxide, GFO, Lanthanum, etc.I’m going to remove the emergency tag as that alk level is typical of high alk salt mixes.
If you want to lower it, I’d either use a different salt water source, or drop it in the store water using sodium bisulfate or muriatic acid followed by plenty of aeration.