HN, for the last several days everyone here has been asking you to please not risk your livestock to a "guesstimate" of your SG yet you seem to refuse the very advice you asked for. Instead, you decided to buy more livestock rather than investing a hundred bucks in a refractometer. Hypo is not a treatment that can be done by "guesswork," it's a very specific treatment that needs to be followed exactly as directed. This is not a case of "it's my tank, so I'll do things my way" it's a proven technique that delivers proven results WHEN INSTRUCTIONS ARE FOLLOWED. I don't mean to start ranting but you're risking your livestock with your attitude. I just can't understand why you continue to ask questions over the last few months and invariably ignore the answers you are given.
Just my .02, good luck to you and your livestock, I truly hope you manage to pull this off.
Later,
Paul