Great video by Al! I got my discus at a large 3.5", now they are approaching 4" each. Without realizing, I did plan an open front to the scape. I'll have take a close look at the features on them now that I know what to look for. According to the video it looks like I should look into water changes every couple days.
Maybe start with a small WC every couple days and see how it affects them, raise if necessary. Anyone know how that's going to affect EI dosing? Seems like if I stay on schedule then it wouldn't matter.