hi guys i had a rbta but it died a long time ago when it spit and my lights got a little old , i sold one and keep the other one then it started to travel all over my tank and one day i found it inside a power head! dead! any way i have a perc and is hosting my duncans now i c it trying to host my yuma recordia , i felt bad for him.lol , i want rbta and my lights are fairly new but i dont want it to start to walk around , can any one give me a advice on how to place a rbta but not have him move around.