so my 2 discus were always shy except when lights are off they come out and so does their coloring. We use to think this ment they are stressed or water conditions were off but this wasnt the case we spent a couple months checking everything getting it dialed in to a t. Now the other day we decided to change our substrate a little to add a couple rocks non live plants and more gravel. we did this slowly and after washing the new items we let them soak in a seaperate container with the actual tank water in it before we added them. after adding there was no major change in water tests. only difference, huge personalities from the discus ever since. just seems odd because we added more areas and places for them to hide and they are now doing the opposite swiming around alot more not skidish and way more active and alert even coloration is deeper. big change from what we are use to. any ideas as to what could be the cause here?