actually found it in a lake at my parents house when collecting driftwood. completely intact. i had soaked it in bleach to sterilize and whiten. will it mess up my parameters? will it decay?
As for decay, as you say it's natural. I would say yes it would decay, but very slowly. Probably the same rate as your drift wood. You will have to take it out and clean the algae off of it probably to keep it nice looking.
As long as all of the "meat" is off of it, it should be fine. The bone will slowly dissolve and raise the hardness, but probably not a noticeable amount. Should make a sweet "ornament"
It may increase water hardness a bit, especially if your water is currently soft and/or acidic. These conditions will also hasten decay. If it's in a pretty big tank the change should be slight. Some types of snails may chew on the bone.
As long as all of the "meat" is off of it, it should be fine. The bone will slowly dissolve and raise the hardness, but probably not a noticeable amount. Should make a sweet "ornament"
If you're worried about "meat" just boil the whole thing and scrap any remnants off. I imagine that if it was in the lake, a bunch of little critters have cleaned it pretty well.