The 50 Lagoon is on my radar for sure. Curious if the cabinet would be long enough for a proper sump. Speaking of sump @Dkeller_nc mentioned being very limited to sump types with that cabinet. I'm inexperienced to say the least regarding sump selections. Any suggestions (not really wanting to do a DYI)?
I'll admit I have no previous experience with that particular cabinet only the one for my Red Sea Max C130 which had a slightly smaller cabinet. I went with a custom sump myself as what @Dkeller_nc is fairly true, there is a rather limited selection of sumps for cabinets that small. I don't have the exact dimensions of it either so I can't really suggest a particular one. It isn't grotesquely expensive going the custom acrylic route as long as you're not wanting something crazy like I ended up getting.