Mississippi fish guy Posted August 27 Share Posted August 27 I just started working on a lava rock cave for my striped ralphael catfish and red wolf fish. I intend to have one main cave with at least two smaller caves attached to the main one. I have never done any kind of rock work and I’m concerned that it will not hold up since it doesn’t feel stable even though I have let the silicone sit for a day and that part still feels unstable. Does anyone have advice/experience with this? 1 Link to comment Share on other sites More sharing options...
Root Posted August 27 Share Posted August 27 I do not, but saw your name and wanted to say hello. I am from MS myself. Hope you get answers soon. Link to comment Share on other sites More sharing options...
Woowala Posted August 27 Share Posted August 27 (edited) jb water weld really any 2 part epoxy putty that's safe for drinking water. take care to hide it as it cures bright white. Edited August 27 by Woowala Link to comment Share on other sites More sharing options...
Mississippi fish guy Posted August 27 Author Share Posted August 27 On 8/27/2024 at 11:30 AM, Woowala said: jb water weld I’m currently using some Locktite water proof silicone since I already had it. Would the jb weld work better? hi @Root Link to comment Share on other sites More sharing options...
Woowala Posted August 27 Share Posted August 27 I think so. Silicone flexes, epoxy cures hard as a rock. I've used it on live rock in reef tanks, pretty similar to lava rock. There's probably a limit as to the size of the structure you could build before you had to drill the rock and use acrylic rods or something, but I'm not sure what that is. At any rate I'd trust the epoxy to hold over the silicone. 1 Link to comment Share on other sites More sharing options...
Mississippi fish guy Posted August 27 Author Share Posted August 27 On 8/27/2024 at 11:47 AM, Woowala said: epoxy cures hard as a rock Thanks! My main problem has been adding more silicone than i want to use to keep the cave stable. I will look into the jb weld Link to comment Share on other sites More sharing options...
Woowala Posted August 27 Share Posted August 27 No problem. Make sure it's jb water weld. It's a ~4 inch putty stick. There are a lot of jb weld epoxies and I have no experience with the other ones. Link to comment Share on other sites More sharing options...
Mississippi fish guy Posted August 27 Author Share Posted August 27 On 8/27/2024 at 12:07 PM, Woowala said: Make sure it's jb water weld. It's a ~4 inch putty stick Is this it? Link to comment Share on other sites More sharing options...
Woowala Posted August 27 Share Posted August 27 That's it Link to comment Share on other sites More sharing options...
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