DIY sump.

[tyler1503]

Hi everyone :)
I have a DIY sump that I bought recently and I've gutted the old baffles (it was designed specifically for bio balls) so I can redesign it how I want it. When I was cutting the old baffles out, I noticed some of the silicon along the corner joins was starting to peel off.
It's still a good water tight seal, but should I be concerned? Also, can I just put new silicon over the old stuff, or do I need to cut the old stuff away first?
Thanks!

 

[Reefing Madness]

Silicone that bonds the glass together is inbetween the panes, the excess is just additional. You can peel that away and reseal that portion if you wanted to.

 

[Giovanni'sReef]

I would clean it up with razor and redo it to be sure