Also the siphon is a hazard but if uve got ur sump Lv right and use a primer there ok. (Primer is as the water runs by it causes a vaccuum)I'd look into drilling I have a 30g HOB and was goin 2 drill then used HOB siphon then took the science into play and wasn't worth the risk With a small tank. but my new 75g is getting drilled once I figure what return I'm using. Might use he ghost that was on here a day ago. And I believe those spotted zoas are galaxy's or something along those lines
I used a glass holes overflow kit on my 40 breeder build and loved it... they're small so they don't take up much room in the tank, and they come with the drill bit and everything you need to connect to your plumbing. Great deal and a pretty good price as well