Here is a differing opinion I had read about goniopora and I found the article. Here is the reference from
www.goniopora.org:
"WATER QUALITY
In just about every saltwater forum that I have read, somewhere within its contents it has been suggested that Goniopora corals love “dirty", unskimmed, or unfiltered water. I have not observed or experienced any truth to this at all; in fact, I have only observed the opposite to be true. In my experience, Goniopora prefer to live in CLEAN WATER. I refer to “clean” water as water that is free from containing ammonia, nitrate, phosphate, dead waste, and unseen decaying organic matter. When Goniopora are kept in clean water and target fed small foods several times a week on a regular basis, they will maintain a very consistent behavior of strong polyp extension and continued growth. It becomes easier to see the need for a water change or an extra feeding because the coral will not seem quite as "happy" as it usually does; this same behavior can be observed with many captive coral species. I believe that the "love of dirty water" philosophy mainly arose from the continual confusion and misunderstanding of the difference between "dirty" water and "nutrient rich" water as it relates to Goniopora. Nutrients for goniopora in the wild consist of various planktons, invertebrate larvae, and tiny eggs; not nitrates. Freshly dissolved foods in the water column and fish waste deposited directly on the coral by chance may provide a very small amount of nutrition in the reef aquarium, but those "foods" will soon be converted to ammonia, nitrate, and phosphate, which are not nutrients for Goniopora. Pollution is not the solution!"