What is this

wsirois

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Can anyone identify. Good or bad

20220101_152710.jpg
 

fishguy242

Cronies..... INSERT BUILD THREAD BADGE HERE !!
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hi,sponge, normally harmless, google type... :)
 

Mastering the art of locking and unlocking water pathways: What type of valves do you have on your aquarium plumbing?

  • Ball valves.

    Votes: 66 51.6%
  • Gate valves.

    Votes: 67 52.3%
  • Check valves.

    Votes: 32 25.0%
  • None.

    Votes: 29 22.7%
  • Other.

    Votes: 9 7.0%
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