i bought a ricordea mushroom roughly a year ago and it has been fine. split months ago, one of those is now splitting and the other on top is doing horribly almost in half now, i put less water flow around, checked all chemicals i can with my kit, ammonia-0 nitrites-0 nitrates-0 calcium 450 ph 8.3, i have 1 picture of that, and i recently found a nudibranch, the green backed kind i think aeoli or something around that. i have some green or brown button polyps, not doing so hot a few of them. others are doing fine, any ideas? maybe too much water flow not enough light, ricordeas are at top of the tank and button polyps near bottom. i have a 2 by 65 watt coralife light with 1 actinic bulb and 1 10,000k bulb