Only thing I've seen that may be a concern (and would be regardless of type of doser I imagine) is that one of the solutions is sorta precipitating at the end of the tubing. Forms sort of a shell so I clean it with a toothpick every couple days. Anyone else see this? I spread my 8 and 12 mL doses into 1mL increments so maybe it's so little that it does this.
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