I'm leaning towards the drift wood. Possibly some store employee in the last 3 years was cleaning and sprayed something on the wood. Or they had a problem with bugs and someone sprayed a pesticide on the pile of DW trying to kill insects or some sort. I did a 50% water change last night and a 50% water change this morning. The DW is still in the tank the fish look like there doing fine now I did an full test pH is 7.4-7.6 range, nitrite 0, Nitrate is about 5 ppm, and ammonia is .25ppm. The ammonia is almost completely gone. I just fed the fish they all ate fine and are swimming around exploring like normal. I'm going to chalk it up to a toxin of some sort. Sucks but it is what it is. I would have boiled the DW but its to large for any pots i have. I thought soaking the water, changing water, soaking, changing ect about 4 times in a 24 hour period would have done it guess not. Nest time I will get some feeders and toss there ass in the bucket with the DW when i think its safe and see what happens over night.
Thanks for all the replies and the help.
It sucks when fish die makes you feel like you failed them in someway but i kept up on water conditions daily, did the recommened dosing of chems per water change. Its tough when you cant figure out the exact problem. Anyways thanks again.