Steve: I am not familiar with glass cages. I am relying totally on my LFS that I knew from before I sold my previous 180 & 320 gallons (4 years ago)... Hope the tank is OK. the work on the plumbing and framing looks VG. Do not need a not so good main tank. Paying my LFS good bucks for it... Thanks for the cautionary note. Filling it up now with a new 90GPD SpectraPure and my old 150GPD RO/DI Combined effluent rdgs at 5 ppm.... Will check for leaks etc but longer term we shall see.