as some of you probably read last night my tank is slightly unlevel left to right and it is bothering me. it is slight so im not worried about it causing an issue. can i shim the tank slightly to correct it? i do not want to shim the stand where it meets the floor. i do not want to put abnormal pressure on one side of the stand as it is a walmart stand anyway. can i shim the right side of the tank where it meets the stand? or just leave the thing alone.