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Reef safe silicone

Can someone tell me what is the reef safe silicone.
I think I remeber GE 1 does that work well will it hold baffles in a sump?
Thanks
 

Mark_C

Staff member
Officer Emeritus
NJRC Member
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I've built 2 sumps with GE 100%. Works well. Keep in mind that it bonds great to glass, not good to plexi. I use plexi baffles. If doing same I would advise a large bead on the glass, ensuring there is adequate amount of silicone on both sides of the plexi baffle to 'lock' it in place.
FYI, my current glass/plexi sump has some complex baffles and has been running a year with no concerns. But, I used a trick (pat.pend. ;) ). I used a very small drill bit to drill a few holes in the plexi, 3 or 4 per side, around the sides and bottom of the baffle. Then, when I placed it in I made sure there was a thick bead of silicone on each side and made sure the silicone on each side met up through the holes in the plexi, effectively anchoring the baffle in place. Probably not necessary, just a thought.
Have fun.
 
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redfishbluefish

Officer Emeritus
Officer Emeritus
Agree with @Mark_C , using a large bead of silicone if doing acrylic to glass. Don't think pretty, think function, and a thick bead will help hold that baffle.

Also, let the silicone cure for as long as you can wait.....three day minimum for me.
 
Are there any good ways for securing new acrylic baffles to a sump that is already in action?
I can't really imagine a multi-day shut down that would allow silicone to cure, so then have started contemplating the aquascape epoxy on my shelf and thinking hm
 

myrjon

Officer Emeritus
Officer Emeritus
A thought ...............1.5 or so pvc tubing cut to height of baffle one for each side.make baffle with snug to fit with tubing on each side...
 
I'm thinking similar but maybe using some soft tubing maybe even airline tube as a gasket of sorts. Not so sure how how silicone will bond with that but at leasts its an out of water experiment
 
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