Who/how to drill a tank at our home?

[Aquattro]

Realistically, if the tank isn't drilled now, I'd probably not worry about it. You can get an external overflow for not too much money and they work fine if taken care of. I haven't used one, but friends have used them for years without issue. Yes, there is a risk that the tank could break, and lots of the corner tanks used tempered glass anyway, which you can't drill. Keep the drilling in mind for the next tank (yes, there's always a next tank).

[Delphinus]

Hi, I saw your other thread too but I'll reply in this one for now... As for drilling, I can either help you out and drill a hole for you, or lend you my drill bits - but as Brad said I think the corner tanks have a better chance of having a tempered bottom. If you have polarized sunglasses, try looking at the glass with them on. Although I think you need there to be a fairly bright light available like direct sun when you do this. If you can see a checkerboard patterning, the glass is tempered.

Other alternatives are drilling out the back glass at the top for a "cup" style overflow. I'll use my FW tank as an example you can check out: http://canreef.com/vbulletin/showthread.php?t=28505

The flip side is that, as Brad mentioned, there are external overflows. Here's an example: http://www.jlaquatics.com/phpstore/s...ct_ID=of-cs100
They do have a few drawbacks compared to drilling, but not significantly so, as mentioned if taken care of properly, these do work quite well in a pinch. And before you go out and buy one I suggest to put up a "wanted" ad because dollars-to-donuts someone will have one lying around that they're not using that you could buy for less than buying new.

I have only 1 two year old (and another on the way), I can only imagine what twins would be like. I think I just felt myself age just thinking about it.

[Der_Iron_Chef]

Heh. Tony, always giving me a good chuckle.

Regarding the tank...I just borrowed Tony's bits (drill bits, that is...haha, awkward)...and drilling the tank was really easy. I would recommend drilling the back pane if it's not tempered (like Tony's freshwater set-up, for example).

I bought a CPR overflow a while back from someone, and am pretty sure I'll never use it now (plans changed). So if you want to look into that, shoot me a PM.