jolliolli Posted February 2, 2007 Report Share Posted February 2, 2007 Hey Guys. So i'm buying a tank that was previously used for Marine, and im going to be running just tropical. The tank has had a hole cut in the bottom for the sump/overflow ( i think thats what its called ). the hole is seperated from the rest of the tank buy some glass that looks to have been siliconed in. So im going to be removing the extra glass and i want to know what the best/safest option is for the patching the hole. Its a 4ft tank. the hole is at a guess 1 - 2 inches in diameter My options i assume are 1. Find something in a plumbing store thats like a bung of some kind to cover the hole ( not sure if this is going to be strong enough due to the pressure of the water ) 2. Get a small bit of glass and some suitable silicon and put a patch of the hole ( is this going to be safe, if the hole was say 1 - 2 inches in diameter how big a bit of glass should i use ). Whats your thoughts. Also i have a second tank ( smaller 2.5 ft ).. i noticed that it has a chip on the outside bottom corner, the chip isnt very big, looks like some glass splintered off, dont believe its effected the sealant on the egde, but not 100% sure. Is this an issue, the tank is full currently ( i think its about 170L ).. just want to make sure its not going to explode. Thanks. Quote Link to comment Share on other sites More sharing options...
Alan Posted February 2, 2007 Report Share Posted February 2, 2007 Give your second tank a water test, should be okay. With the patch it will be ample to cut a piece of glass that will overlap the hole by about 10 to 20mm and just silicone it on. Make sure that the outside of the patch has the glue spread around neatly after fixing the patch to stop any water ingress, that could then harbour algae and cause the patch to leak in time, possibly. Quote Link to comment Share on other sites More sharing options...
evilknieval69 Posted February 2, 2007 Report Share Posted February 2, 2007 Yep i second what Alan said to do with the patch Alan, the second tank she/he said was already full... How long has it been full? How long has the crack been there? Should be sweet if its been like that for a long time.... Quote Link to comment Share on other sites More sharing options...
jolliolli Posted February 2, 2007 Author Report Share Posted February 2, 2007 has been full for a couple of weeks only its a fairly new tank ( bought second hand ).. i think it should be fine.. As for the silicon, can you recommend a good product? i see selleys has a glass silicon that is supposed to be ok for tanks.. Any thoughts? can you point me in the direction of a suitable product. Finally should the patch glass be as thick as the rest of the tank? ( i assume the answer is yes ) Thanks for the help.. Quote Link to comment Share on other sites More sharing options...
evilknieval69 Posted February 2, 2007 Report Share Posted February 2, 2007 Tank should be alright then.... I use selleys glass silicon all the time. Never had a problem with it. Preferably the patch should be same thickness as tank or more yes HTH Quote Link to comment Share on other sites More sharing options...
Ira Posted February 2, 2007 Report Share Posted February 2, 2007 Just use the overflow for a sump, sumps rock. Quote Link to comment Share on other sites More sharing options...
evilknieval69 Posted February 2, 2007 Report Share Posted February 2, 2007 Quote Link to comment Share on other sites More sharing options...
Alan Posted February 2, 2007 Report Share Posted February 2, 2007 Make sure that the silicone is acidic cure. It should have a VERY strong vinegar smell. Don't breathe the fumes, and use in ventilated area. Quote Link to comment Share on other sites More sharing options...
jolliolli Posted February 2, 2007 Author Report Share Posted February 2, 2007 Cool thanks.. will pick something up this weekend Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted February 2, 2007 Report Share Posted February 2, 2007 The correct RTV (silicone) will have suitable for aquariums on the label. Quote Link to comment Share on other sites More sharing options...
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