Finally upgrading my 180 gal glass tank to 375 gal plexiglass in hoping to provide more swimming room for angels and butterflyfish. As many of my Chaetodontoplus angels in the 180 got bigger through the years they were running into the wall. There were many hesitations on the upgrade because glass is much clearer and the tank was doing well. Of course, to rip out the existing tank and setting up a tank twice the size is a challenging task. However, with the help of the BAR community it has been less stressful and makes the journey rewarding in term of sharing ideas and creative visions.