they have to me as well,
The sump I bought on kijiji for 30 bucks and got a berlin skimmer for 20,
pretty sweet
Well I am not using the skimmer yet because I have a fw tank, in time I plan on going to salt
I had to modify the sump so I cut the tank up and modded it as needed. Silly me I didnt know that you have only two options for sealing acrylic, the weld on solvent or jb waterweld,
Long story short before I knew this I went to big als and told them I had an acrylic sump and I needed a sealant, they got me to buy a 14 dollar tube of Silicone that is aquarium safe, turns out it is virtually useless for acrylic unless it is just for the baffles.
I have heard you can use GEI sealant but from what I have found around here that silicone have mildew resistance and that I have been told can harm the fish.
I feel like I got shafted and dont know if I want to give them anymore money