It is just my humble opinion but....I think you should take the ray back to your lfs and get credit for it.....no offence but the questions you have been asking are ones that you should have been able to answer yourself before you ever bought a ray, and I believe you did absolutley zero research when you bought this ray. If it dies ( I hope it doesen't ) I think you will impulse buy another one and the cycle will start all over again. Rays are not like goldfish, You need to have a very clear knowledge of what your getting into, and be able to properly care for them. otherwise leave them to the folk that can and do.....Just my 2 cents.