Can't stabilize Bromine bank

Yes, I seem to recall mention of a speedster during my whirlwind tour of available testers. So, are we saying that a Taylor kit with a speedster is the good setup? I seem to recall a 2006 model number. Which would you recommend for my basic needs?
 
The k2006 and the tf-100 have basically the same tests with the same Taylor reagents.

The TF-100 is a better value for the number of tests you get.

The SpeedStir is an add on for either.
 
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