two glue questions

[lastduke]

Is PVC pipe cement toxic to fish/coral?

Is silicon sealant for door/window toxic to fish/coral?

[Toddrtrex]

No, let it cure first.

As long as it doesn't have any anti mildew "stuff" in it, it will work great.

[MrSquid]

Good timing - I was just popping in to ask this same question!

With the "anti-mildew stuff"... is that labeled somehow on the can??

[cilyjr]

most people around here use ge silicone I. i used it in the sump it works with no effects to water quality. it turned yellow however in my tank...i was glad i bought the all glass stuff for the display.

pvc cement is for use on potable water so it will be fine after it has set.

[Toddrtrex]

<a href=showthread.php?s=&postid=11397969#post11397969 target=_blank>Originally posted</a> by MrSquid
Good timing - I was just popping in to ask this same question!

With the "anti-mildew stuff"... is that labeled somehow on the can??

I know for a fact that the "kitchen and bath" stuff has it in there for sure. There has been some talk that it is in the other stuff now, but I don't know that for a fact. Perhaps compare the ingredients of the two.

[lastduke]

The Epoxy failed its job again!!!!! This time I used at least 2 inch tube of epoxy, glue the surfaces of two rock to make like a T shape, the contact area was larger than 1 inch square, both surface contacted the epoxy surface solidly. Then I left the rocks 3 hours there, touched the epoxy and made sure it was as hard as stone, live the top rock, the expoxy was seperated from top rock!!!!!! I gave up and used some super glue on top of expoxy surface, but I don't think it will work well. l am going to leave them alone.
After the experiment, I dount expoxy can secure two live rock UNDERWATER, if the surface is wet, it is really hard to stay on it.

[kau_cinta_ku]

expoxy will not hold rocks together like cement. it will only help stabalize the rocks. you can still break expoxy apart afer a year. your best bet would be to drill the rock and put some acrylic rods through both of them.

[lastduke]

ye, kau, some friends here suggested me to do that, but the 1/2 inch pipe is too big for my rocks, I dont' think they can stay in whole piece when the 1/2 inch drill bit running in it.

Maybe I should get some small diameter acrylic rods.

[kau_cinta_ku]

acrylic rods would be your best bet IMO.

here is a good thread where Travis shows how he did it.
http://www.siouxfallsareaaquariumsociety.com/phpBB2/viewtopic.php?t=19

[lastduke]

nice rock work, thank you for the link kau.

[kau_cinta_ku]

not a problem. thats why were here:D

good luck