Does keeping more rays together or in groups make em more active? Since i got my new guys all of them including my motoros will glide across the tank and go up and down the slides is this normal? My water is good Ph 6.5 nitrite nil, nitrate 25.ppm, but i did install and extra tetra tec 1200 canister last night they like swimming underneath the spraybar, or are they just playing? Also they are eating very well.