clownbaby Posted May 9 Share Posted May 9 I've gotten mixed results from my internet research, and some people say certain brands are safe while other brands are not. I'd like to do a 3d background with spray foam on my new ten gallon tank but I obviously do not want it to poison fish ... is spray foam safe? If so, which brand works best? Thanks for the help!!! Link to comment Share on other sites More sharing options...
AllFishNoBrakes Posted May 9 Share Posted May 9 Look up Serpa Design on YouTube. They make all their own stuff, and use spray foam galore. 2 Link to comment Share on other sites More sharing options...
macdaddy36 Posted May 9 Share Posted May 9 Great stuff pond and stone is what people typically use in aquarium/pond 2 Link to comment Share on other sites More sharing options...
madmark285 Posted May 10 Share Posted May 10 Just use care on not applying it too deep, it need moisture from the atmosphere to cure. For example, if you fill a PVC pipe with Great Stuff, the middle will not cure. I found out the hard way while making Harry Potter candles, fill the pipe then cut them down to size. What a mess that was. What many do, after the foam cures you slice off the outer skin of the foam (silicone will not adhere to it) . Then cover the foam with silicone and pack substrate/rocks into the silicone. 1 Link to comment Share on other sites More sharing options...
Biotope Biologist Posted May 10 Share Posted May 10 Expanding foam is aquarium safe. I almost exclusively use great stuff black- the pond and stone one is just marketing gimmick to get you to pay extra I use it to create fake rocks often to lower the overall weight of the display 2 Link to comment Share on other sites More sharing options...
OnlyGenusCaps Posted May 13 Share Posted May 13 On 5/10/2024 at 3:10 AM, madmark285 said: while making Harry Potter candles I feel like while that statement does not surprise me coming from you, it also deserves an explanation. 🤪 2 Link to comment Share on other sites More sharing options...
madmark285 Posted May 15 Share Posted May 15 On 5/12/2024 at 9:02 PM, OnlyGenusCaps said: I feel like while that statement does not surprise me coming from you, Yes it does, sorry for the delay but had to find a photo We host a neighborhood Halloween party/hayride. So the this will be easy plan for our screened in porch, take a piece of PVC pipe, cut it into 3 pieces then squirt foam into to it from both sides. Once cured, cut the smaller candles from it. I quickly discovered the foam did not cure inside the pipe and would start expanding once cut. It was a bloody mess. Note: a hot glue gun was used to create the dripping wax effect. But they came out great, there are over 30 candles hanging. What I should have used, two-part liquid, expanding rigid urethane foam. Once mixed together, this stuff will cure anywhere. I use this for my much delay Mbuna condo project: I made platforms for the rocks and placed balloons filled with sand on the base. I poured 3# density urethane foam around them. Remove the balloon and now I have condos for the Mbuna. I will set this tank up after our 3 week vacation in July. 2 1 Link to comment Share on other sites More sharing options...
OnlyGenusCaps Posted May 15 Share Posted May 15 You are a bottomless pit of creativity and ingenuity, sir! Annoying as they may have been to create, those are some sweet looking candles! I wish I had neighbors like you! My neighbors are fine. But this is next level! Link to comment Share on other sites More sharing options...
Flumpweesel Posted May 15 Share Posted May 15 I'd have just used the pipe to make the candles - we did them at work once with just paper tubes. They look great though my street doesn't play dress up 😞 Link to comment Share on other sites More sharing options...
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