I can tell you a little bit about goniporia from a recent "lesson learned" experience. I saw the coral, liked it, was told it was "easy" (new person at the store) and found out afterwards this is one of the hardest corals to keep alive.
From the moment I got the coral home I knew it was in trouble. It went from vibrant, fluffy, to withdrawn. It expanded once or twice, but then withdrew and began fading. It was going to die and I had to do something about it.
I did some research on the species as a whole, finding that many species can't be kept alive in aquariums and die within a year. In fact it's very common for them to die in captivity. Goniporia is very complex in it's needs, with to me, seemed odd, I mean, it didn't look complicated. LOL.
Anyhow, this is what I learned. The most common species of goniporia found in aquariums lives in shallow areas, where they actually get wave action. They need LOTS of light. and I mean lots. They also need to be fed multiple times a day. The biggest thing…feeding them at night. They also seem to thrive in normal than average temperatures, again, close to the surface of the water, directly under the halides where they had direct light and nothing in their way.
What I did was pretty simple. I mean, it was gonna work or it wasn't, the coral was on it's way out the door at this point having lost 40% of it's iridescence.
I re-arranged my rocks, putting my gonaporia about 2-3 inches beneath the surface and about 10 inches-12 inches under my halide light. I started by feeding it at night (this is a big thing. Apparently goniporia usually feeds at night), then gradually, adding tiny day feedings of just plankton. Gonaporia is often found in waters that are not as clear and clean as many corals. They have a lot of debris, therefore a lot of opportunity for feeding. Of course you can't do that in an aquarium because of the other corals, so I substituted this by putting it close to a wave maker, (about 10 inches) on medium, the wave maker tilted up ward so it ripples the water creating "waves", small enough not to hurt to knock over other coral, but big enough that they "hit" the goniporia constantly.
Within 48 hours I saw a remarkable difference. Within a week, my goniporia is looking nearly as good as it did when I bought it, if not larger than when I bought it. It's still regaining it's color and the polyps I was sure were dead, have in fact, reemerged green and fluffy. I did something similar, although not to the same degree, with my pipe organ, and it too has changed dramatically. Based on this information, and reading about where corals are found on the ocean floor and how the depth they are found can actually affect their shape, I am going to redesign my tank to replicate a "reef" edge vs what looks pretty. I'm kind of excited about the project and hope that it will make a big difference in how my corals do. My goniporia is very happy now, still recovering, but significantly fatter and meatier than even when I first got it. From here on out I plan on looking at where a species lives in the water, vs, where the reef store has it kept. Another thing too, I've noticed, lots of coral species that don't live near each other in the wild are kept in a tank. So that complicates things it seems. I'm going to try my best to try and keep corals that live in the same area together, vs, extreme differences.
I almost bought an elegance coral, I fell in love with it when I saw it, glad I didn't. But then, the boss guy was there that day and he said it was a VERY difficult coral to keep.
Anyhow, that's my experience with goniporia. It might have been luck, but I don't think so. I think trying to make it's environment as close to home is what saved it.