I know from lurking around this and other aquarium forums that most people prefer a drilled tank, but I am quite content with a trustworthy overflow box.
From my reading, if set up with the proper flow and overflow design, there can be a reasonable expectation of success with one.
One of my friends who got me into this hobby has been running an overflow for 2 years and never had the siphon break on his system.
Drilling an older tank seems like a bit of a risk to me and just an added hassle compared to just putting an order in for a working out of the box overflow.
so for now, I'm just going to plan for lifereef overflow, I've done a lot of asking over on rc and on the net and it seems like they are very reputable, especially for their overflows.
I admit a predrilled tank would be convenient to have from the word go though.
I'm just sold on this lifereef stuff now.
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