Someone just PM'd me:
Kathy,
Could I ask where to buy Sodium Thiosulfate and how do make up a stock solution to add to my 2 liter phytoplankton culture.
Thank you so much,
xxxx
I appreciate the question, and thought the rest of those folks with the same question would like to have the answer as well.
There are a number of sources of Sodium Thiosulfate, google is your friend here, but I got mine from Florida Aqua Farms, in 2006, a lifetime supply. Get yourself a postal scale from Office Depot or Max, and weigh out 6 grams of ST, dissolve in 100 ml of water, salt or fresh, but not tap (chlorine in there). This is your stock solution.
Now if you have used 2 ml of bleach to sterilize 2 gallons of water, just use 2 ml of ST to dechlorinate.
Household bleach is about 5.5 % chlorine, one gram of ST neutralizes one gram of chlorine, so using an equal volume of 6% (6 grams in 100 ml water) ST should make sure that you are chlorine free. I always test with a chlorine test strip anyway, just to be certain.
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