Questions! Did you buy it second hand? Have you put water in it yet? What do the silicone seams look like?
I only ask because my cousin gave me his 34g solana and well it seeps from the seams. He broke it down when he sold his house and had to keep it in storage for two months then kept it in his garage for another 5 months all during a very hot summer here in Texas. The black silicone they used dry rotted. I noticed when cleaning the calcium build up. Long story short I'll be removing the AIO filter and sump and just having an all glass aquarium with refugium sump once I
re-seal it. It was definately a bummer and set back for my reef setup, so I instead switched to starting my 30g planted tank.