making small tank

Um...no caulk or liquid nails. 100% silicone and you better brace it well.

 

i would say the same... no caulk... ive used silicone to fix a leaking 60 gal and worked like a charm. pretty cheap stuff too.

 

the kind i used was clear but if its not for display and just for funtionality color shouldnt matterand it should be fine as long as its 100% silicone

 

Superglue doesn't hold as well as you think it would. Color doesn't matter, just for looks. As long as it says 100% Silicone you're fine.

 

I have used GE 100% silicone for years works great never had a problem. I would not use super glue it wont hurt the water as it is used for frags all the time but it wont hold a tank together.Just put masking tape on eather side of your joint the thinkness you want the seal to be don't worry about around the bottum as the trim hides it anyway. Then after you lay down your seal take your finger slitly wet it first then run it over the seal to push it in good then pull your tape off. Works like a charm it will look like a professional job.Hope this helps!
-Bill

 

Being that the tank is done this is a bit of a moot point, but walmart has 10g tanks (just the tank) for 12 bucks and change. That even sounds bigger than what you made though.

 

pet store has 100% Silicone for 12.00 for a 10 oz tube and you know its for it good luck if you need a small tank cant you make it out of acrylic ?

 

If you're handy, you can use some glue called 14 or something like that that melts acrylic together. But you have to use it with a syringe and it takes a bit to get use to working with from what I hear. But since it melts the acrylic together it makes it pretty much the strongest thing you can use.

 

weld on number 3 and number 16, used to bond acrylic together.