pH probe leaking? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 01-25-2019, 12:32 PM Thread Starter
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pH probe leaking?

Hello folks,

I have a Milwaukee MA911 pH probe, the one that comes with their pH monitor. It has a yellow body and a blue cap. It seems that every few weeks, it develops a clear translucent goo at the tip. At first, I thought it might be fungus growing, but then I though what if it is the gel inside leaking out. I did a little bit of reading, and it seems that pH probes have a "junction" that is semi-porous so the electrolyte solution can leak into the aquarium, and the purpose of gel is the make it leak SLOWER. Anyway, has anybody also seen a clear-ish goo accumulation at the tip of your ph probe? (I guess not, because I don't see other people complain about it on the internet)
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post #2 of 6 (permalink) Old 01-25-2019, 05:06 PM
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I find "something" tends to form on the whole thing and I do a quick but vigorous swishing in a bit of bleach or peroxide treated water as it tends to knock back both algae or whatever. Any coating that gets over the tip will gradually make the reading/calibration drift off.
I see lots of comments about the calibration drifting but I also wonder if the true cause is not the tip getting dirty. Since the tip is such thin fragile glass, I really don't want something to get so solid, that I might need to scrub much to clear it.
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post #3 of 6 (permalink) Old 01-25-2019, 05:37 PM
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Quote:
Originally Posted by beanbag View Post
Anyway, has anybody also seen a clear-ish goo accumulation at the tip of your ph probe?
I'm sure they make an antibiotic for that...
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My algae is the only plant that pearls.
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post #4 of 6 (permalink) Old 01-28-2019, 11:56 AM Thread Starter
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Called the company. They confirmed it was leaking. End thread
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post #5 of 6 (permalink) Old 01-28-2019, 03:37 PM
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Did they offer to replace the probe or anything similar, or is this something normal and you're expected to replace the probe yourself?

My algae is the only plant that pearls.
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post #6 of 6 (permalink) Old 01-25-2020, 11:32 AM Thread Starter
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2020 bump to say that 3 out of 3 Milwaukee pH probes leaked on me, where after a few weeks there is a translucent goo that forms on the tip.
Does anybody have experience with pH probes that last a long time and don't leak?
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