Hang on overflows VS. Drilled

[Orion]

I've been wanting to upgrade the filtration for my 75 gallon for a while. It's not drilled, so my simplest option would be to use a hang on overflow going to a sump.

Never used one or seen one. Are these really worth the money as an alternitive to drilling a tank?

 

[OCCFan023]

yes they are, many people with reefs and not a drilled tank will use them.

They can be finiky to get the flow inline with the return pump but it is worth it if drilling the takn isnt a option (your tank is full at the momet right?)

 

[Orion]

That's exactly it OCC. I've got a full tank, and no where to move the fish even for just temporary.

I figured it was worth it seeing as how many tanks I've seen with them, but I just wanted to point blank ask before I start on such a thing and end up wasteing money.

I'll end up buying the overflow pre-made, and DIY the sump. Any suggestions of particular brands or types that are good overflows?

 

[OCCFan023]

Ive ussually only seen these:
Overflow Box - Marine Depot - Marine and Reef Aquarium Super Store
the cpr brand.

Yea if your tank is stocked then tearing it down for the amount of time it would take the tank to get drilled would be very burdensome. And then god forbdide the tank breaks during drilling then your really in a jam.