<p style="text-align:left"><span style="font-family: Times New Roman"><span style="font-size: 13px">This is what Randy Holmes-Farley recommends- FWIW</span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">Several references site tissue release and/or burning above this.</span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">21.7 dKH=7.75 meq=387.5ppm</span></span>
http://www.saltyzoo.com/SaltyCalcs/AlkConv.php">http://www.saltyzoo.com/SaltyCalcs/AlkConv.php</a>
...and, hasn't the Seachem salt/borate issue been addressed somewhat(?) At any rate, I believe that he used IO salt, so that does not apply in this case. The levels below should apply, as is.
<span style="font-family: Times New Roman"><span style="font-size: 14px"></span></span>
<span style="font-family: Times New Roman"><span style="font-size: 14px">[B]Recommended Ranges[/B]</span></span><span style="font-family: Times New Roman"><span style="font-size: 13px"> </span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">Before getting into problems and solutions, let’s first define what constitutes a problem and what does not. Based on [IMG]http://www.advancedaquarist.com/issues/apr2002/chem.htm">published studies</a>3 involving the calcification of corals and other organisms, I recommend the following: </span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">[IMG]http://www.advancedaquarist.com/issues/feb2002/chemistry.htm">Alkalinity</a>2 (due to bicarbonate and carbonate but not borate, so those using Seachem salt must raise this value substantially to accommodate the borate being counted in standard alkalinity tests) </span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">2.5 - 4 meq/L or 7 - 11 dKH or 125 - 200 ppm CaCO3 equivalents</span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px">Calcium: </span></span>
<span style="font-family: Times New Roman"><span style="font-size: 13px"><span style="font-family: Times New Roman">380 – 450 ppm calcium ion or 950 - 1125 ppm CaCO3 equivalents</span></span></span>