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Expanded foam
http://byap.backyardmagazines.com/forum/viewtopic.php?f=35&t=27889
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Author:  mr water [ Oct 28th, '16, 09:41 ]
Post subject:  Expanded foam

Hey guys, I'm going to mold a tapered drain into the RFF im building, to make the waste drain easier.

I've heard 'black waterfall' or something like that is fish safe but I can't find it local..

I've also heard most of the others use arsenic in their construction. So.. dont really want to use them.

Has anyone used some before?

I could always coat it with pure silicone to proof it but I would still worry about the arsenic content if the silicone wasn't a perfect seal..

Thanks guys!
Trent

Author:  dstjohn99 [ Oct 28th, '16, 23:35 ]
Post subject:  Re: Expanded foam

Try this or similar. This one says fish safe. There are others available too. I searched pond foam and got several hits.

Author:  dstjohn99 [ Oct 28th, '16, 23:39 ]
Post subject:  Re: Expanded foam

Try this or similar. This one says fish safe. There are others available too. I searched pond foam and got several hits.

Author:  mr water [ Nov 3rd, '16, 22:14 ]
Post subject:  Re: Expanded foam

How strange! I never got the notification of a reply. So sorry I never replied. Thank you

Thank you, I found this one by aquatec
Image

Hopefully this sticks ok to the plastic drum!

I will post a picture in my system thread if it does work :)

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