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Discussion Starter · #1 ·
super glue does not hold as well as i was lead to believe... it held for a week and dissolved... i glued a marble to the bottom of a sponge filter to keep it from floating and it did not hold...
 

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With the sponge filter in the tank, just squeeze all the air out of the sponge and it shouldn't float after it's saturated.
 

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Discussion Starter · #3 ·
Well it does lol they where not bought sponge filters... they are diy filters 1 is made out of sponge I bought from Petco. The other one is a sponge I bought from dollar tree to try out... both float even though the one from Petco is a filter material sponge.
 

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Use epoxy glue, it holds very well under water. You mix the 2 parts out of the water, wait until it starts to harden but is still semi-liquid, and you can apply it directly under water if you need to.
 

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Discussion Starter · #5 ·

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put a river rock inside the sponge and a couple on top, once you use it a bit it will sink without them.
 

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Discussion Starter · #9 ·
ew

put a river rock inside the sponge and a couple on top, once you use it a bit it will sink without them.
I'm going for a boulder less aqua scape :) its a good idea though..
 

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Discussion Starter · #10 ·
well

Or glue the sponge to a 4 inch ceramic tile.
While the glue was holding the clear half marbles I was using worked very well and looked pretty awesome.. besides that the nearest place to me that sells tiles is 2 hours away one way. Thanks for the idea though.
 
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