According to the Sulfite Calculator, 4 grams of K-Meta gives 100 ppm free SO2, probably higher than needed normally and could give off some odors.
<BIG>
Sulphite Addition Table</BIG>
<DIV align=center>Sulphite Source: Potassium Metabisulphite
Sulphite Form: Powder
Batch Size: 6 U.S. Gallons
<TABLE cellPadding=5 width="75%" align=center border=1><T>
<T>
<TR>
<TH>Required SO<SUB>2</SUB>
(mg/L)</TH>
<TH>Addition (g)</TH>
<TH>Addition (tsp)</TH></TR>
<TR>
<TD align=middle>0</TD>
<TD align=middle>0.00</TD>
<TD align=middle>0.00</TD></TR>
<TR>
<TD align=middle>5</TD>
<TD align=middle>0.20</TD>
<TD align=middle>0.03</TD></TR>
<TR>
<TD align=middle>10</TD>
<TD align=middle>0.39</TD>
<TD align=middle>0.06</TD></TR>
<TR>
<TD align=middle>15</TD>
<TD align=middle>0.59</TD>
<TD align=middle>0.10</TD></TR>
<TR>
<TD align=middle>20</TD>
<TD align=middle>0.79</TD>
<TD align=middle>0.13</TD></TR>
<TR>
<TD align=middle>25</TD>
<TD align=middle>0.99</TD>
<TD align=middle>0.16</TD></TR>
<TR>
<TD align=middle>30</TD>
<TD align=middle>1.18</TD>
<TD align=middle>0.19</TD></TR>
<TR>
<TD align=middle>35</TD>
<TD align=middle>1.38</TD>
<TD align=middle>0.22</TD></TR>
<TR>
<TD align=middle>40</TD>
<TD align=middle>1.58</TD>
<TD align=middle>0.25</TD></TR>
<TR>
<TD align=middle>45</TD>
<TD align=middle>1.77</TD>
<TD align=middle>0.29</TD></TR>
<TR>
<TD align=middle>50</TD>
<TD align=middle>1.97</TD>
<TD align=middle>0.32</TD></TR>
<TR>
<TD align=middle>55</TD>
<TD align=middle>2.17</TD>
<TD align=middle>0.35</TD></TR>
<TR>
<TD align=middle>60</TD>
<TD align=middle>2.36</TD>
<TD align=middle>0.38</TD></TR>
<TR>
<TD align=middle>65</TD>
<TD align=middle>2.56</TD>
<TD align=middle>0.41</TD></TR>
<TR>
<TD align=middle>70</TD>
<TD align=middle>2.76</TD>
<TD align=middle>0.44</TD></TR>
<TR>
<TD align=middle>75</TD>
<TD align=middle>2.96</TD>
<TD align=middle>0.48</TD></TR>
<TR>
<TD align=middle>80</TD>
<TD align=middle>3.15</TD>
<TD align=middle>0.51</TD></TR>
<TR>
<TD align=middle>85</TD>
<TD align=middle>3.35</TD>
<TD align=middle>0.54</TD></TR>
<TR>
<TD align=middle>90</TD>
<TD align=middle>3.55</TD>
<TD align=middle>0.57</TD></TR>
<TR>
<TD align=middle>95</TD>
<TD align=middle>3.74</TD>
<TD align=middle>0.60</TD></TR>
<TR>
<TD align=middle>100</TD>
<TD align=middle>3.94</TD>
<TD align=middle>0.64</TD></TR></T></T></TABLE>
Table created by Sulphite Table Generator on December 4, 2007
www.fermsoft.com
5.5 grams of Sorbate is about right-maybe even a little low. I'm not sure of the density of the sorbate you have, but atypical Sorbate calls for 1/2 tsp per gallon which is 3 teasoons per 6 gallons. 5.5.g grams converts out to 1.159 teaspoons with an average density powder(but they vary a lot accounting for the difference here). Always use the amount recommended by the manufacturer.
Edited by: appleman