how many of you have made stupid mistakes that cost you? i'll start -water change with town water. unbeknown to me town had just shocked system- total wipeout- $1000 -had tank in upstairs living room in new house. big window,heat wave,105 degrees in room, cooked tank $1000 remidies- r o unit, move tank to downstairs living room-no sun my son-built a structure out of pbc tube and rock,though he was using aquarium safe silicone-wrong- had a mouldicide in it- comlete tank wideout in 10 hrs-$4000