I have been told that you have to be careful with how many leather corals you have in your tank because they release toxins when threatened and can make keeping SPS very difficult. I'm wondering what kind of experience people have had with this. Any problems? How much is too much when adding leathers? I have a 54 gal corner with one yellow fiji leather (growing fast is now about 5 inches across), but also have some very small monti caps, birdsnest, and monti digitata (that I hope will grow big over time). I've got my eye on a long polyp mushroom leather. Too much?