For the past 2-3 years I have been running a fluval 304, I just ordered my heater yesterday and I will be puchasing a 18 watt turbo twist uv sterilizer before the month is over, today I am pulling out all of my plants and decor and giving them a huge cleaning followed with a good vaccum of the gravel (which I already do 2-3x a month) and I will add some stress coat and salt and raise the temp to about 80 and we will just see what happens, like I said before it seem's like my clow knife is really the only fish who seems to be scratching and it's driving both of us CRAZY!!!!