You should keep a proper balance between your ca and alk. I think your alk should depend on your calcium. Somewhere I found a calculator to determine the proper alk depending on your calcium level. I made this table. Sorry I can't find the website with the calculator anymore. Therefore, I aim for a calcium of 420 and alk of 8.4
Calcium/Alkalinity Balance
Ca (ppm) - Alkalinity (dKH)
360 ---- 0
370 ---- 1.4
380 ---- 2.8
390 ---- 4.2
400 ---- 5.6
405 ---- 6.3
410 ---- 7.0
415 ---- 7.7
420 ---- 8.4
425 ---- 9.1
430 ---- 9.8
435 ---- 10.5
440 ---- 11.2
445 ---- 11.9
450 ---- 12.6
460 ---- 14.0
470 ---- 15.4
480 ---- 16.8
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300 gal starphire custom built in pentagon reef (+90 gal sump on Blue Line 100 HD return pump, 210lb LR, Euro-Reef RC250 skimmer, 2x400W MH, 2x28W compacts, 2xTurbelle classic 4002 pumps & Turbelle Stream 6100 on 7095 Multicontroller, running ZEOvit)
Livestock
Fish: damsels; sailfin, yellow, regal & naso tangs; ocellaris & tomato clowns; lyretail anthias; foxface lo; flame angelfish
corals: a few
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