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Old 04-30-2013, 01:21 AM   #1
bytemyfoot's Avatar
Aug 2009
South Jersey, NJ
Posts: 100

I just got my pH meter today. It came with a tiny scrap of sponge in the cap, but it seems way too tiny to keep the probe moist. It doesn't look like regular kitchen sponge. Any recommendations on what I can use to replace it?
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Old 04-30-2013, 01:53 AM   #2
Sep 2011
Robbinsdale, MN
Posts: 796
Liked 77 Times on 64 Posts

It's ok to not use the sponge and just fill the cap portion with storage solution, storing the meter upright.

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Old 04-30-2013, 02:16 PM   #3
Aug 2010
McLean/Ogden, Virginia/Quebec
Posts: 9,413
Liked 1556 Times on 1184 Posts

The object is to keep the humidity up so the bulb doesn't dry out. I wouldn't worry about it. You can put enough storage solution in there to completely cover the sponge. Creep and evaporation will eventually remove liquid from the cap. The sponge will give you some extra time if you forget to replenish.

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