Whats the best way to patch holes drilled in the bottom of a tank?

[lockrookie]

i would do a glass patch and glue surface to surface and all edges of the patch. not sure what thickness you have but put it terms as this if a rock falls on it will it crack easy. if you think so then its not thick enough glass patch. other than that i seeno issues

[Borderjumper]

I would fill the holes with a goodly amount of silicone before siliconing the patch on. Just don't over fill the holes as you don't want that area to bear any weight from the bottom.

[theokie]

Thanks for all the quick responses.

I'm probably going to go the patch route, using half inch thick glass to match the tank bottom thickness.

There is a third option but It might be a half assed way to do it, reduce the size of the overflow box and install an L-shaped coast to coast overflow, so I can use the two holes in the bottom and then only have to drill one additional hole in the back for the third drain, for a bean animal style.

so I would have a smaller corner overflow with a larger coast to coast style perched on top of it.

[sphelps]

I like the 4th option, leave as is
I don't see a huge benefit of converting a corner overflow into a coast to coast. With the return placed on the opposite side you won't have any surface skimming issues.

[theokie]

Originally Posted by sphelps

I like the 4th option, leave as is
I don't see a huge benefit of converting a corner overflow into a coast to coast. With the return placed on the opposite side you won't have any surface skimming issues.

Leaving it as is would work, as this aquarium was a gift from my other half, but then it was also stipulated that the aquarium has to be quite enough so the room can still be a guest bedroom, so I was hoping that the increased surface area would result in a large weir and make the overflow quiter, as if i have a splashing overflow, i'm pretty sure the tank won't last long.

[ScubaSteve]

Personally, I'd leave it as is. If you spend some time tuning the system and getting the plumbing inside the overflow box right (herbie overflow), it should be nice and quiet.

[sphelps]

Yeah coast to coast won't be any quieter unless you're planning a wave box or something else that will generate an actual wave but such devices are noisy alone. Standard box with a herbie will be completely silent. Sounds like you've already got two holes so you're good to go.