Is this overflow compromised?

[vcnt]

resetting up this tank and I just googled the marineland overflows and this post of reef2reef, the dude's overflows look new and mine are far from it, the entire bottom portion is withered away almost looking like prev owner cut out those holes

Are these safe to use?

Pic 1- New Overflow

Pic 2 - My overflow



EDIT -

they do also include these removeable front panels

 

[vcnt]

bump

 

[Dread Pirate Dave]

resetting up this tank and I just googled the marineland overflows and this post of reef2reef, the dude's overflows look new and mine are far from it, the entire bottom portion is withered away almost looking like prev owner cut out those holes

Are these safe to use?

Pic 1- New Overflow

Pic 2 - My overflow



EDIT -

they do also include these removeable front panels

Those holes shouldn't be there. If your return pump stops and the standpipe behind the overflow is low or leaks then the water level will eventually go down to the height of your standpipe at best or to the height of those holes at worst.

 

[vcnt]

Those holes shouldn't be there. If your return pump stops and the standpipe behind the overflow is low or leaks then the water level will eventually go down to the height of your standpipe at best or to the height of those holes at worst.

How does one go about fixing this?

Cementing abs behind it?

n yeah ... i knnow they shouldnt be there im pretty sure prev owner cut them

 

[Dread Pirate Dave]

How does one go about fixing this?

Cementing abs behind it?

n yeah ... i knnow they shouldnt be there im pretty sure prev owner cut them

That would be what I would try. The silicone should stick to the ABS better than acrylic.