Tank Drilling/Overflows

[Beldarr]

So I am going to drill a new tank I just bought. (New to me but Used)

After 7 months in the Hobby I feel confident in going bigger so I got me a great deal on a 150 gallon tank.

I am planning on drilling 2 holes in the back glass for overflows and one in the middle for the return.

My question is, why do I have to do a herbie or whatever other kind of overflow? Can I not just put to one inch holes in the tank near the top on opposite sides, surround it with a overflow box, and allow the water to just go straight out the hole and down the drain?

[laga77]

You can do it that way but it will be very noisy. Herbie and beananimal overflows are designed to be quiet.

[Rubasu]

I'm thinking about drilling my 40b since I will have to move it when I get new carpet in that room anyway... laga - What is the noisy part? The water going into the hole, or the water splashing into the sump? My sump will be down about 4ft in the basement area.

[MeghanisradxD]

The water going into the hole can be noisy. Depending on your return pump, it will draw air in and cause a very loud gurgling sound. It can be avoided by adding a ball valve to the return pump and adjusting the flow. I'm no expert, so don't listen to me for details, but I believe the herbie and bean animal utilize a siphon down to the sump and have a backup drain should the siphon ever break.

[Breadman03]

I just drilled a 150 for BeanAnimal drains and installed a coast to coast overflow. I'm telling you, if you're drilling a tank, go all the way. The only way I hear water moving is when a snail is cleaning the back side of the overflow and the 3 drains provide for failsafes in case of clogs.

[chimmike]

I just drilled a 150 for BeanAnimal drains and installed a coast to coast overflow. I'm telling you, if you're drilling a tank, go all the way. The only way I hear water moving is when a snail is cleaning the back side of the overflow and the 3 drains provide for failsafes in case of clogs.

^^^^^ X1000000000

Do it right the first time or regret it from them onward.