Dosing bottles / containers?
Ditto. I use the 500 ml bottles as well. I use them for NPK as well as micros and metricide. I have a smaller one I use for treating tap water. On each bottle i have a post it note with the various dosages.
It makes dosing simple. I used to do the syringe thing but it gets old just like the syringes, I no longer order them
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