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I have recently received a new GLA CO2 regulator. But I am having problems filling the bubble counter. The instructions read, "Hold the acrylic tube of the bubble counter in place with one hand and carefully unscrew the bubble counter cap with the other hand. Fill the counter tube 3/4 with water." I have unscrewed the cap, but the hole is tiny. I have tried unscrewing other parts but the rest of the bubble counter is solid. Am I supposed to fill the bubble counter using a needle and syringe? Am I the only one with this problem? Please help.
 

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When I had mine I used 5ml medicine dropper from the pharmacy. Little tiny turkey baster work well too. They are called "pipettes".

That's also what I use to dose ferts with, just get ones that are graduated. I think the ones I have are in .25ml increments. Pipettes also work really well for filling drop checkers.
 
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