bummer on your cat's eye and gsp. I thought those were pretty indestructible. Love your inhabitants list. Impressive. I should do that just to keep records. My 45's are set prety close to yours, except middle of each side of tank. At night I just do a straight 40% regular flow with alternating to give a "rest". I think I run reverse for 5 min and forward 10. How high do you have yours set. Most of my settings except night are at 50