I bought the sparkley one in october to put in my 75 with my other p that I have had since he was a fry. The sparkley one was nippin hardcore at the smaller p's fins so I felt I had to separate them. I put the sparkley one in a 29 with a filter from the 75 and some driftwood. One week later he was dead. I think that the driftwood had something to do with it, it was treated and everything. It was a sad day.