Hello fellow reefers. I was fortunate to become a new owner of a used a RSM 250. I am learning the importance of modifications. I am currently replacing all the fans since this unit is 5+ yrs old. I am hoping that these small changes will bring the temp down to a desirable level. My 2nd mod will be building a hang over weir overflow that can fit in the accessory holes. I am in the process of a deep clean but will supply pictures and details on how this goes.