Replacing stock overflows on a 120 gallon

[JD2716]

Hello! I was wondering if anyone had ever pulled the stock overflows off a 120 gallon tank? My thinking is if I pulled the acrylic boxes off and siliconed a sheet of glass over the holes or use some bulk heads with plugs I could drill the back for the tank for a shadow overflow. Is this a good or bad idea?

 

[ndrwater]

Definitely possible

 

[ChiFlyGuy]

Build Thread - 120g Craigslist tank restoration

Finally, I found a 120g for a used price $200. She’s the ugliest most beautiful thing I have ever laid eyes on. I’m going to strip the two overflows, add a ghost overflow and oh so much more to get this one wet again. I decided to put my money towards reputable equipment, instead of the glass...

www.reef2reef.com

I found just the thread for you

 

[rrspike]

I just removed the stock overflows from a 180 today . A little careful cutting and out they came, I dremeled the bottom and used braided fishing line to cut the vertical silicone seams . Pulled the overflows and removed the remaining left over bottom peices. The stock silicone tank seals never get touched . All cleaned up and you would never know they were there after a good razor balding and cleaning . Planning a modular marine 1800GPH low profile external overflow set up as a penisula. All in all took me around 1 1/2 hrs . Good luck