Suction cups not sticking - The Planted Tank Forum
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post #1 of 17 (permalink) Old 03-24-2014, 01:37 AM Thread Starter
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Suction cups not sticking

I have some suction cups on a powerhead that just don't want to stick to the aquarium glass for more than a day. Every day I am sticking the powerhead back on to the glass because at least 1 or 2 of the 3 suction cups give way.

Anything I can try besides buying new suction cups?

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post #2 of 17 (permalink) Old 03-24-2014, 02:56 AM
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Silicone grease and push really hard :-)
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post #3 of 17 (permalink) Old 03-24-2014, 12:15 PM Thread Starter
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Is silicone grease going to hurt anything in the tank though?


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post #4 of 17 (permalink) Old 03-24-2014, 12:30 PM
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Suction cups hardened over years. Just boil it, good as new.
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post #5 of 17 (permalink) Old 03-24-2014, 12:31 PM Thread Starter
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Boiling seems heck of a lot easier than grease! I'll give that a shot first before the grease suggestion. How long do you boil them for?


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post #6 of 17 (permalink) Old 03-24-2014, 12:35 PM
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You can buy aquarium safe silicone.
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post #7 of 17 (permalink) Old 03-24-2014, 12:36 PM Thread Starter
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Originally Posted by HUNTER View Post
You can buy aquarium safe silicone.
Yeah... but I don't to permanently attach the powerhead to the side of the aquarium


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post #8 of 17 (permalink) Old 03-24-2014, 12:39 PM
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silicone grease != Silicone. the grease is a lubricant and stays more like the consisetency or vaseline, the other is an adhesive and hardens.
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post #9 of 17 (permalink) Old 03-24-2014, 12:49 PM
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Be careful boiling them. You risk deforming them

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post #10 of 17 (permalink) Old 03-24-2014, 12:52 PM
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magnets. Zoo Med mag clips or make your own.
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post #11 of 17 (permalink) Old 03-24-2014, 12:59 PM
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You might try cleaning the glass and suction cups. It's worked for me many times. Never heard of boiling to soften them. I'll have to try that.
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post #12 of 17 (permalink) Old 03-24-2014, 01:40 PM
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dip into boiling water for a min or so...


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post #13 of 17 (permalink) Old 03-24-2014, 02:35 PM Thread Starter
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Quote:
Originally Posted by wdgiles View Post
silicone grease != Silicone. the grease is a lubricant and stays more like the consisetency or vaseline, the other is an adhesive and hardens.
That's what I thought. I'm just not sure if silicone grease is aquarium safe though...


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Be careful boiling them. You risk deforming them

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Yeah... that's what I'm worried about


Quote:
Originally Posted by aquabruce View Post
magnets. Zoo Med mag clips or make your own.
This has crossed my mind as well if other options don't work. That's how my Koralia Nano circulation pump is held in my saltwater tank.


Quote:
Originally Posted by Zorfox View Post
You might try cleaning the glass and suction cups. It's worked for me many times. Never heard of boiling to soften them. I'll have to try that.
I've tried cleaning the glass but still no luck. I never cleaned the suction cups though. I'll give this a shot too.


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Originally Posted by acitydweller View Post
dip into boiling water for a min or so...
OK... I don't think a minute or 2 will harm them. Thanks for the advice.



Very good suggestions here. I'll try a good majority of these and see what works. Thanks all!


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post #14 of 17 (permalink) Old 03-24-2014, 03:06 PM
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Silicone grease is recommended by all canister filter manufacturers to lubricate the O-rings. Petroleum jelly can break down the rubber.

I've been using it in my tanks for over 10 years now.
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post #15 of 17 (permalink) Old 03-24-2014, 03:10 PM Thread Starter
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I did not know that. Thank you!

I will use it if the other options don't work for me.


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