Costs were as follows.
Wood (4x4's and plywood): $597
Acrylic window: $750
2 Part Epoxy: $175
Fiberglass Cloth and Epoxy: $382
Tools and supplies for fiberglass: $45
Silicone: $120
Lag screws, washers, wood screws: $216
Liquid Nails: $15
Drill Bits and Spade Drills: $25
Kilz Paint & Masonry Sealant: $57
Paint Brushes & Rollers: $66
Sand Paper: $35
Latex Gloves: $18
PVC jacks built to hold window in place while curing: $56
Trip to the ER for stiches after I drove a cordless phillips head screw driver through my finger: $50 Copay
Building you own shark tank: Priceless
Well, not really. $2,607
Sounds like alot until you consider a tank this size will cost you about $13,000 professionally made, all acrylic.
Of course my wife says: Yeah, but your not done yet.